All you have to do is put a piece of very fine grit sandpaper on a flat surface, place the black centering block on it, & rub until you remove a bit from the bottom of the block.
It should be/is very easy to do that in an even fashion. As far as causing any other blemishes, I cannot understand how that would be possible using this method.
I did it with one of mine (so far) & it was simple as well as straight forward. Seemed to tighten the hotspot a bit also.
—
You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"
To make clear what I mean I took a photo of both the GT and my Boss. The first photo is the GT. It clearly is brighter, but there is a lot of light around the hotspot. IF it was possible to concentrate that light, it would improve the beam.
This is a beamshot of my Palight Boss with a dedomed XP-L V6 1A. There is very little light around the center. If only I could make my GT throw the same.
@ johny723 ……. OK….. I think I now understand what you are saying. I do not think this is possible with the GT reflector / LED setup. It was designed to spill this amount of light so as to be a more ““useful”“ light.
This is what I remember anyway.
—
You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"
To make clear what I mean I took a photo of both the GT and my Boss. The first photo is the GT. It clearly is brighter, but there is a lot of light around the hotspot. IF it was possible to concentrate that light, it would improve the beam.
This is a beamshot of my Palight Boss with a dedomed XP-L V6 1A. There is very little light around the center. If only I could make my GT throw the same.
I measured my friend’s GT too only swapping the head and his got even worse numbers than mine. The batteries were fully charged and his GT only pushed uot 894 Kcd. Mine does 980 Kcd again but interesting the different results at different distances.
I measured my friend’s GT too only swapping the head and his got even worse numbers than mine. The batteries were fully charged and his GT only pushed uot 894 Kcd. Mine does 980 Kcd again but interesting the different results at different distances.
We both got our GT in early March and they travelled together according to changes in tracking had only few minutes differences between the two lights. So I think they are same manufacturing batch got not so throwy. I need to get a strap wrench or something and then try focusing.
I managed to open my GT head with a leather belt
I printed out Enderman’s focus checking circles with the 3 square. I have still my friend’s GT too so I checked both. Mine was good for about 1m distance and then started to seem over focused. The 3 square moved to the center. At 7-8m the 3 squares almost completely overlapping each other. That is why I got the biggest numbers at 10m because it was focused around that distence. My friend’s GT was even worse. As we seen in the intensity numbers too. So I need to sand the centering plate thinner. I needed to go to work so tomorrow I will measure centering plate thickness and sand it down a little.
could you take a beamshot before and after sanding the centering plate?
you don’t see it on a beamshot. Maybe with the focusing templates you can see the squares but with naked eye I don’t think so. But I will try to make photos.
I meant a photo that compares hotspot of a stock vs sanded centerpiece
I can try but you will don’t see much I think. These are not huge differences just hunting for the perfection. If I can manage to focus better and make 1100 kcd from my 980 kcd it is not what you can notice in a few meter wall beamshot.
Just tell us if sanding down the centerpiece improves the hotspot at larger distances. Especially if it can remove the corona and make the center brighter.
I have some results! My theory was a bit wrong. The centering plastic wasn’t too thick. It was thin. I sanded down from 2,5mm to 2,33mm and it made worse. I only got 874 kcd from the stock 980. So I started placing kapton tape stripes to the bottom and about every 0,1-0,15mm added I reassembled the head and went outside to measure lux at 10, 15, 20, 25m.
Today’s last result was 1100000 cd at 20m with 3,17mm thick centering plastic. This is not the end and I have pics and a lot of numbers. The interesting that as it was getting better the highest number moved to the bigger measuring distances which I think is good because the beam is more parallel and forming the hot spot farther is good. Tomorrow I have a lot to do but I think I will add some more tape under that centering piece and I want to find the best focus setting. And I will post all the pics and numbers when Im done.
Stay tuned!
The latest batch of reflectors was made by another company (which is why there was no shipping delay this time). It is possible that the focal length has been changed slightly. It would line up well with the XHP70.2 I built.
I used a 4.25mm centering ring on the first light I built and it had no dark spot but it took almost 5mm to get the same results with the new one.
—
I want to buy a used video card, GTX 650 or better preferred.
Gun control is not about guns; it's about control.
I have some results! My theory was a bit wrong. The centering plastic wasn’t too thick. It was thin. I sanded down from 2,5mm to 2,33mm and it made worse. I only got 874 kcd from the stock 980. So I started placing kapton tape stripes to the bottom and about every 0,1-0,15mm added I reassembled the head and went outside to measure lux at 10, 15, 20, 25m.
Today’s last result was 1100000 cd at 20m with 3,17mm thick centering plastic. This is not the end and I have pics and a lot of numbers. The interesting that as it was getting better the highest number moved to the bigger measuring distances which I think is good because the beam is more parallel and forming the hot spot farther is good. Tomorrow I have a lot to do but I think I will add some more tape under that centering piece and I want to find the best focus setting. And I will post all the pics and numbers when Im done.
Stay tuned!
Plastic shims for under or on top of the centering block. Mine is shimmed at 3mm thick overall, my other GT’s reflector was better so I swapped them. Dark hole in the beam 3.5-4ft. off the wall.
I think the cooling is not siginificantly worse in the GT, we are talking about ~20W only And I power my LED with only 5A current.
The beam is very very tight… really cool.
Lower temperature = higher output, even if the LED is very low wattage
That’s why I used a CPU heatsink, cooling fan, and liquid metal, so that I could run my Black Flat up to 6A without a decrease in output.
After running about 30 Minutes on Turbo on a sunny afternoon
I tweaked the focus a little bit but it is still far from perfection. Measured 1.7 Mcd-2.3Mcd.
Today I went up to 3,42mm centering piece thickness and got 1174500 cd.
but the hot spot started washing out so I think the optimal thickness is between the 3,17mm and 3,42mm. Now I need to sleep so I will try the last steps a few days later when I have more time.
Do you have a donut hole in the beam or not? I hat a visible donut hole when I placed shims under the centering plate. It was visible even at 250m distances
Today I went up to 3,42mm centering piece thickness and got 1174500 cd.
but the hot spot started washing out so I think the optimal thickness is between the 3,17mm and 3,42mm. Now I need to sleep so I will try the last steps a few days later when I have more time.
Good info, If you find a perfect thickness I will pass it onto lumintop and see if they can make some updated centering rings.
Anyone else that wants to experiment with this be sure to post your findings as well, the more the better.
—
I want to buy a used video card, GTX 650 or better preferred.
Gun control is not about guns; it's about control.
Today I went up to 3,42mm centering piece thickness and got 1174500 cd.
but the hot spot started washing out so I think the optimal thickness is between the 3,17mm and 3,42mm. Now I need to sleep so I will try the last steps a few days later when I have more time.
Good info, If you find a perfect thickness I will pass it onto lumintop and see if they can make some updated centering rings.
Anyone else that wants to experiment with this be sure to post your findings as well, the more the better.
Luckily I have my friend’s GT in my hand so I will try focusing that too. That was even worse stock than mine. It only got 894000 cd. Now I have two workdays so I don’t have time for it but after that I will upload all results.
EDIT: I talked another hungarian forum member and he will send me his GT head too to measure it and focus it. So I will have 3 GT focus tests but all 3 is from the late February or early March batch because they all had same tracking movements around few minute differences.
Today I went up to 3,42mm centering piece thickness and got 1174500 cd.
but the hot spot started washing out so I think the optimal thickness is between the 3,17mm and 3,42mm. Now I need to sleep so I will try the last steps a few days later when I have more time.
Good info, If you find a perfect thickness I will pass it onto lumintop and see if they can make some updated centering rings.
Anyone else that wants to experiment with this be sure to post your findings as well, the more the better.
Luckily I have my friend’s GT in my hand so I will try focusing that too. That was even worse stock than mine. It only got 894000 cd. Now I have two workdays so I don’t have time for it but after that I will upload all results.
EDIT: I talked another hungarian forum member and he will send me his GT head too to measure it and focus it. So I will have 3 GT focus tests but all 3 is from the late February or early March batch because they all had same tracking movements around few minute differences.
Ok, so these are from the old reflectors, still good information to have.
—
I want to buy a used video card, GTX 650 or better preferred.
Gun control is not about guns; it's about control.
I spend one morning messing with the center piece of my GT, made it both thinner and thicker, but never got rid of the slight donut hole, and the throw did not get better. I may have to look more precisely, but I first have to replace the ledboard screws with version that do not have a very round head but heads with a straight side, so that the center piece can be positioned exactly and keep the led in focus. But it takes too much time already, I will first wait for a new led to arrive..
“I used to think that top environmental problems were biodiversity loss, ecosystem collapse and climate change. I thought that thirty years of good science could address these problems. I was wrong. The top environmental problems are selfishness, greed and apathy, and to deal with these we need a cultural and spiritual transformation. And we scientists don’t know how to do that.” (Gus Speth)
I have been testing with my GT using a flat plastic piece placed under the original centering disc. I have cut it with the same shape of Lumintop disk but with a bigger central hole. (Similar to those in the picture of KawiBoy1428) I started with a thickness of 1.10 mm and I have repeated readings sanding it down to 0, 90mm, 0, 70mm and 0.40 mm.
The starting point is 1.203.000Cd using a boiling thinner dedomed XHP35 E4 HD.
Lux readings were taken at 10m. I have no more available length in my house but I will try to measure in the community garage at 15 and 20m this night, when the lights can stay off, without car transit. As it is only an experiment the readings are taken at the start of the light. Therefore, No ANSI
These are my results at 10m.
- 1.10mm: Ugly spot with blurred edges and a very marked black hole up to 5m. I did not mensure. It was obvious that the result would be bad.
- 0,90mm: Nicer beam profile with a more definite spot. The black hole from 4-5m onwards was replaced by a central area that, although irregular, was more illuminated than the rest of the spot. 1.092.000Cd.
- 0,70mm: More defined spot. Illuminated area in the center of the spot is regular. 1.229.000Cd.
- 0,40mm: Perfect and well defined spot. 1.299.000Cd.
I finished the sanding because I hurt my fingertip with the sandpaper.
I received my GT on February 23rd. I don’t know the date of manufacture
My luxmeter is a cheap LX1010B. I have hope that when I buy in the future a better luxmeter the results will improve.
All you have to do is put a piece of very fine grit sandpaper on a flat surface, place the black centering block on it, & rub until you remove a bit from the bottom of the block.
It should be/is very easy to do that in an even fashion. As far as causing any other blemishes, I cannot understand how that would be possible using this method.
I did it with one of mine (so far) & it was simple as well as straight forward. Seemed to tighten the hotspot a bit also.
You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"
Texas Lumens Flashlights <> M4D M4X Deals : sign up - save $$$$ ||||
Rudeness Level /\ mΩ /\ {width:70%} /\ LightWiki /\ LED Tint Chart /\ LED Tint Picture /\ Xlamp size chart /\ BatteryU Flashaholic? Need Professional Help???
/\ TheOriginal /\ TAB /\ LightSearch /\ BatterySearch /\ 14500's /\ DiCal
@ johny723
Here are some links where people sanded their Centering Ring. JasonWW states he tightened his hotspot considerably.
Do some reading on either side of these linked posts & there is a bunch more info.
I cannot find the photo’s I mentioned by DB Custom, but I did find several by KawiBoy1428.
.
http://budgetlightforum.com/comment/1284074#comment-1284074
http://budgetlightforum.com/comment/1284516#comment-1284516
http://budgetlightforum.com/comment/1284105#comment-1284105
http://budgetlightforum.com/comment/1265552#comment-1265552
http://budgetlightforum.com/comment/1259418#comment-1259418
You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"
Texas Lumens Flashlights <> M4D M4X Deals : sign up - save $$$$ ||||
Rudeness Level /\ mΩ /\ {width:70%} /\ LightWiki /\ LED Tint Chart /\ LED Tint Picture /\ Xlamp size chart /\ BatteryU Flashaholic? Need Professional Help???
/\ TheOriginal /\ TAB /\ LightSearch /\ BatterySearch /\ 14500's /\ DiCal
Thanks, I will read through the links.
You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"
Texas Lumens Flashlights <> M4D M4X Deals : sign up - save $$$$ ||||
Rudeness Level /\ mΩ /\ {width:70%} /\ LightWiki /\ LED Tint Chart /\ LED Tint Picture /\ Xlamp size chart /\ BatteryU Flashaholic? Need Professional Help???
/\ TheOriginal /\ TAB /\ LightSearch /\ BatterySearch /\ 14500's /\ DiCal
To make clear what I mean I took a photo of both the GT and my Boss. The first photo is the GT. It clearly is brighter, but there is a lot of light around the hotspot. IF it was possible to concentrate that light, it would improve the beam.
https://drive.google.com/open?id=1kFRRLwlCDB2OQj9aelrFFDmyvlax7aqp
This is a beamshot of my Palight Boss with a dedomed XP-L V6 1A. There is very little light around the center. If only I could make my GT throw the same.
https://drive.google.com/open?id=1UaIh6b8YzZo_9kNg5a_FxVRYQUrpQxuO
@ johny723 ……. OK….. I think I now understand what you are saying. I do not think this is possible with the GT reflector / LED setup. It was designed to spill this amount of light so as to be a more ““useful”“ light.
This is what I remember anyway.
You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"
Texas Lumens Flashlights <> M4D M4X Deals : sign up - save $$$$ ||||
Rudeness Level /\ mΩ /\ {width:70%} /\ LightWiki /\ LED Tint Chart /\ LED Tint Picture /\ Xlamp size chart /\ BatteryU Flashaholic? Need Professional Help???
/\ TheOriginal /\ TAB /\ LightSearch /\ BatterySearch /\ 14500's /\ DiCal
Thanks.. i bet dedome xpl will give some green tint..
I measured my friend’s GT too only swapping the head and his got even worse numbers than mine. The batteries were fully charged and his GT only pushed uot 894 Kcd. Mine does 980 Kcd again but interesting the different results at different distances.
Mine:
10m: 980 Kcd
15m: 969 Kcd
20m: 928 Kcd
25m: 929 Kcd
His:
10m: 894 Kcd
15m: 857 Kcd
20m: 856 Kcd
25m: 877 Kcd
I think it is mostly a focusing problem so I will try to open the head and try enderman’s focusing method
Reviews: Sofirn SP32A, Thorfire VG15S, Thorfire VG10S, Thorfire TG06S
Mods: Small sun T08 MT-G2, Eagle eye X6 triple XPL, Ultrafire F13 MT-G2, Convoy C8 XHP70, Solarstorm T3 triple XP-L HI
Big flashlight measurement and beamshot collection
3D printing stuff for flashlights
My flashlight related Instagram
Let us know what the results are.
I want to buy a used video card, GTX 650 or better preferred.
Gun control is not about guns; it's about control.
Texas Avenger Driver Series
My LED Test series - XP-L2 V5 - Nichia 219C 90+ CRI - Latticebright "XM-L" - XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5 - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT - XHP70.2 P2 - XHP50.2 J4 - Samsung LH351D
Easy comparison tool for all my LED tests
We both got our GT in early March and they travelled together according to changes in tracking had only few minutes differences between the two lights. So I think they are same manufacturing batch got not so throwy. I need to get a strap wrench or something and then try focusing.
Reviews: Sofirn SP32A, Thorfire VG15S, Thorfire VG10S, Thorfire TG06S
Mods: Small sun T08 MT-G2, Eagle eye X6 triple XPL, Ultrafire F13 MT-G2, Convoy C8 XHP70, Solarstorm T3 triple XP-L HI
Big flashlight measurement and beamshot collection
3D printing stuff for flashlights
My flashlight related Instagram
I managed to open my GT head with a leather belt
I printed out Enderman’s focus checking circles with the 3 square. I have still my friend’s GT too so I checked both. Mine was good for about 1m distance and then started to seem over focused. The 3 square moved to the center. At 7-8m the 3 squares almost completely overlapping each other. That is why I got the biggest numbers at 10m because it was focused around that distence. My friend’s GT was even worse. As we seen in the intensity numbers too. So I need to sand the centering plate thinner. I needed to go to work so tomorrow I will measure centering plate thickness and sand it down a little.
Reviews: Sofirn SP32A, Thorfire VG15S, Thorfire VG10S, Thorfire TG06S
Mods: Small sun T08 MT-G2, Eagle eye X6 triple XPL, Ultrafire F13 MT-G2, Convoy C8 XHP70, Solarstorm T3 triple XP-L HI
Big flashlight measurement and beamshot collection
3D printing stuff for flashlights
My flashlight related Instagram
could you take a beamshot before and after sanding the centering plate?
you don’t see it on a beamshot. Maybe with the focusing templates you can see the squares but with naked eye I don’t think so. But I will try to make photos.
Reviews: Sofirn SP32A, Thorfire VG15S, Thorfire VG10S, Thorfire TG06S
Mods: Small sun T08 MT-G2, Eagle eye X6 triple XPL, Ultrafire F13 MT-G2, Convoy C8 XHP70, Solarstorm T3 triple XP-L HI
Big flashlight measurement and beamshot collection
3D printing stuff for flashlights
My flashlight related Instagram
I meant a photo that compares hotspot of a stock vs sanded centerpiece
I can try but you will don’t see much I think. These are not huge differences just hunting for the perfection. If I can manage to focus better and make 1100 kcd from my 980 kcd it is not what you can notice in a few meter wall beamshot.
Reviews: Sofirn SP32A, Thorfire VG15S, Thorfire VG10S, Thorfire TG06S
Mods: Small sun T08 MT-G2, Eagle eye X6 triple XPL, Ultrafire F13 MT-G2, Convoy C8 XHP70, Solarstorm T3 triple XP-L HI
Big flashlight measurement and beamshot collection
3D printing stuff for flashlights
My flashlight related Instagram
Just tell us if sanding down the centerpiece improves the hotspot at larger distances. Especially if it can remove the corona and make the center brighter.
Sure I will report results
Reviews: Sofirn SP32A, Thorfire VG15S, Thorfire VG10S, Thorfire TG06S
Mods: Small sun T08 MT-G2, Eagle eye X6 triple XPL, Ultrafire F13 MT-G2, Convoy C8 XHP70, Solarstorm T3 triple XP-L HI
Big flashlight measurement and beamshot collection
3D printing stuff for flashlights
My flashlight related Instagram
Thanks!
I have some results!
My theory was a bit wrong. The centering plastic wasn’t too thick. It was thin. I sanded down from 2,5mm to 2,33mm and it made worse. I only got 874 kcd from the stock 980. So I started placing kapton tape stripes to the bottom and about every 0,1-0,15mm added I reassembled the head and went outside to measure lux at 10, 15, 20, 25m.
Today’s last result was 1100000 cd at 20m with 3,17mm thick centering plastic. This is not the end and I have pics and a lot of numbers. The interesting that as it was getting better the highest number moved to the bigger measuring distances which I think is good because the beam is more parallel and forming the hot spot farther is good. Tomorrow I have a lot to do but I think I will add some more tape under that centering piece and I want to find the best focus setting. And I will post all the pics and numbers when Im done.
Stay tuned!
Reviews: Sofirn SP32A, Thorfire VG15S, Thorfire VG10S, Thorfire TG06S
Mods: Small sun T08 MT-G2, Eagle eye X6 triple XPL, Ultrafire F13 MT-G2, Convoy C8 XHP70, Solarstorm T3 triple XP-L HI
Big flashlight measurement and beamshot collection
3D printing stuff for flashlights
My flashlight related Instagram
Interesting, thank you for sharing
Very interesting results.
The latest batch of reflectors was made by another company (which is why there was no shipping delay this time). It is possible that the focal length has been changed slightly. It would line up well with the XHP70.2 I built.
I used a 4.25mm centering ring on the first light I built and it had no dark spot but it took almost 5mm to get the same results with the new one.
I want to buy a used video card, GTX 650 or better preferred.
Gun control is not about guns; it's about control.
Texas Avenger Driver Series
My LED Test series - XP-L2 V5 - Nichia 219C 90+ CRI - Latticebright "XM-L" - XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5 - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT - XHP70.2 P2 - XHP50.2 J4 - Samsung LH351D
Easy comparison tool for all my LED tests
Plastic shims for under or on top of the centering block. Mine is shimmed at 3mm thick overall, my other GT’s reflector was better so I swapped them. Dark hole in the beam 3.5-4ft. off the wall.
KB1428 “Live Life WOT”
After running about 30 Minutes on Turbo on a sunny afternoon
I tweaked the focus a little bit but it is still far from perfection. Measured 1.7 Mcd-2.3Mcd.
Regards
Kenjii
Today I went up to 3,42mm centering piece thickness and got 1174500 cd.
but the hot spot started washing out so I think the optimal thickness is between the 3,17mm and 3,42mm. Now I need to sleep so I will try the last steps a few days later when I have more time.
Reviews: Sofirn SP32A, Thorfire VG15S, Thorfire VG10S, Thorfire TG06S
Mods: Small sun T08 MT-G2, Eagle eye X6 triple XPL, Ultrafire F13 MT-G2, Convoy C8 XHP70, Solarstorm T3 triple XP-L HI
Big flashlight measurement and beamshot collection
3D printing stuff for flashlights
My flashlight related Instagram
Do you have a donut hole in the beam or not? I hat a visible donut hole when I placed shims under the centering plate. It was visible even at 250m distances
Good info, If you find a perfect thickness I will pass it onto lumintop and see if they can make some updated centering rings.
Anyone else that wants to experiment with this be sure to post your findings as well, the more the better.
I want to buy a used video card, GTX 650 or better preferred.
Gun control is not about guns; it's about control.
Texas Avenger Driver Series
My LED Test series - XP-L2 V5 - Nichia 219C 90+ CRI - Latticebright "XM-L" - XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5 - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT - XHP70.2 P2 - XHP50.2 J4 - Samsung LH351D
Easy comparison tool for all my LED tests
Luckily I have my friend’s GT in my hand so I will try focusing that too. That was even worse stock than mine. It only got 894000 cd. Now I have two workdays so I don’t have time for it but after that I will upload all results.
EDIT: I talked another hungarian forum member and he will send me his GT head too to measure it and focus it. So I will have 3 GT focus tests but all 3 is from the late February or early March batch because they all had same tracking movements around few minute differences.
Reviews: Sofirn SP32A, Thorfire VG15S, Thorfire VG10S, Thorfire TG06S
Mods: Small sun T08 MT-G2, Eagle eye X6 triple XPL, Ultrafire F13 MT-G2, Convoy C8 XHP70, Solarstorm T3 triple XP-L HI
Big flashlight measurement and beamshot collection
3D printing stuff for flashlights
My flashlight related Instagram
Ok, so these are from the old reflectors, still good information to have.
I want to buy a used video card, GTX 650 or better preferred.
Gun control is not about guns; it's about control.
Texas Avenger Driver Series
My LED Test series - XP-L2 V5 - Nichia 219C 90+ CRI - Latticebright "XM-L" - XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5 - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT - XHP70.2 P2 - XHP50.2 J4 - Samsung LH351D
Easy comparison tool for all my LED tests
I spend one morning messing with the center piece of my GT, made it both thinner and thicker, but never got rid of the slight donut hole, and the throw did not get better. I may have to look more precisely, but I first have to replace the ledboard screws with version that do not have a very round head but heads with a straight side, so that the center piece can be positioned exactly and keep the led in focus. But it takes too much time already, I will first wait for a new led to arrive..
link to djozz tests
“I used to think that top environmental problems were biodiversity loss, ecosystem collapse and climate change. I thought that thirty years of good science could address these problems. I was wrong. The top environmental problems are selfishness, greed and apathy, and to deal with these we need a cultural and spiritual transformation. And we scientists don’t know how to do that.” (Gus Speth)
I have been testing with my GT using a flat plastic piece placed under the original centering disc. I have cut it with the same shape of Lumintop disk but with a bigger central hole. (Similar to those in the picture of KawiBoy1428) I started with a thickness of 1.10 mm and I have repeated readings sanding it down to 0, 90mm, 0, 70mm and 0.40 mm.
The starting point is 1.203.000Cd using a boiling thinner dedomed XHP35 E4 HD.
Lux readings were taken at 10m. I have no more available length in my house but I will try to measure in the community garage at 15 and 20m this night, when the lights can stay off, without car transit. As it is only an experiment the readings are taken at the start of the light. Therefore, No ANSI
These are my results at 10m.
- 1.10mm: Ugly spot with blurred edges and a very marked black hole up to 5m. I did not mensure. It was obvious that the result would be bad.
- 0,90mm: Nicer beam profile with a more definite spot. The black hole from 4-5m onwards was replaced by a central area that, although irregular, was more illuminated than the rest of the spot. 1.092.000Cd.
- 0,70mm: More defined spot. Illuminated area in the center of the spot is regular. 1.229.000Cd.
- 0,40mm: Perfect and well defined spot. 1.299.000Cd.
I finished the sanding because I hurt my fingertip with the sandpaper.
I received my GT on February 23rd. I don’t know the date of manufacture
My luxmeter is a cheap LX1010B. I have hope that when I buy in the future a better luxmeter the results will improve.
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