outdoor beamshots Skyray A0 clone, distance 200m
mouse out with dome
mouse over dedome
outdoor beamshots Skyray A0 clone, distance 200m
mouse out with dome
mouse over dedome
Nice mouseover… that pretty much nails the results I had as well.
X9 de-domed
Old lux 38,120kcd
New lux 61,920kcd
Old lumens 786
New lumens 575
Nice beamshot viffer750. Amazing the warm (er yellow) shift on these de-domed. Mine too. I est from 3C 5000K to 3500K (er yellow). IF I do another, I’ll start with a U2 1A and hope to end up at 5000K. Craig at Illumination Supply has some U2 1A on 16mm boards on sale for $6.50……
You're absolutely right, Viffer. That little A0 clone is so small I forget that the reflector isn't as big as it's output makes you think it is. That is an amazing difference!
The C8s arrived!!! (5 of them :bigsmile: )
They cost me >$15US each and include aluminum reflectors, glass lenses and an overall very good fit and finish considering the price.
Three of the five have quite cold tints so I decided one of those needed de-doming. I used the Dremel method this time: ground the LED dome down to <1mm and stuck the felt wheel in before finishing with a optics cloth.
So far it looks very promising: When at 2.5A (battery at 3.8V) it throws as well as a X9 at 2A (3.6V) however the hotspot is 1/2 the size…. just recharging the batteries to put them both on a even footing… photos to follow.
Looks like the tint definitely got better.
Are colors like that in reality also?
Beam-shots of the cut-domed C8 vs X9
Stock vs Cut and polished dome… the difference is more then is shown by the camera
X9 vs cut + polished XML of the C8
yes, similar
Had to a have another play around with the C8s…. and here is what i got:
The partial de-domed I mentioned in the post a few above is on the left and a complete de-dome on the right, both were the same tint before any mods.
To do this I used the method of running the LED until it got very hot (took pill out of C8 body and attached it to a battery, took all of 1 min to get hot enough) and then I just peeled it off… piece of cake and left a perfect finish.
Keep testing guys.
Out of these experiments will come a formula to convert many leds into great performers.
Bs @ 250 meter ,12 sec,220 KLUX
DX SST 90 Reflector ,XM-L U3 cooper dedomed @ 4,9 A >)
Xandre
If I de-dome my greenish purple T6, will it give me a better tint?
It sits in a p60 host.
Yes,it will go to more yellow.
Xandre
Can you measure Lux?
It will be very interesting, which dedomed gives more Lux.
No sorry… however I can tell you now the completely de-domed LED gives the brighter hotspot. While the partially de-domed one came very close to the same throw as an Trustfire X9 at 2.0A (it fell ~5% short) the completely de-domed one manages to equal the X9 at 2.8A… from this my guesstimate of lux is around 40-45K lux… I think the LED in the C8 was getting around 3.5A for both of these comparisons.
Hi Andi. I de-domed my X7 partially with a knife first and max was 127 kCd. With totally dedomed led it was ~ 160 kCd
With bigger hole in bottom of reflector and modification to put led inside reflector it is now 182 kCd! Yippee!
I also have measures of de-cuttet & dedomed, but it was interesting, if other people measure the same like me.
@Ledsmoke: i also have 182KLux, but that´s the lowest measurement.
s. Now i try Aceton, but best method for me was/is cookplate. Yesterday i cooked another XM-L….works great.
The lowest! Wonderful :-)
Andi dedomed my EBL 6.1 Olympic-Torch
Hello, I have got some new stuff for you [image] You might know my other lights: https://budgetlightforum.com/t/-/6297 Well the third one (3 XM-Ls and one 26650 IMR) you could not really use because of the runtime. So I receivied it again and converted it a little bit. Let me present you the "Olympic Torch" [image] [image] Some specs: output: about 6000 Emitter Lumens and 5000 OTF Lumens [image] power supply: 4 x 26650 batteries led: 3 x Cree XM-L T5 and 3 x Cree XM-L U2 driver: A…
340 KLUX >)
Xandre