Except at 1 meter the hotspot is around 5cm… It’s absolutely tiny. I did it to mine before accidentally breaking the bond wires trying to fix it.
My X9 is killing my STL-V2 now. I keep grabbing it when I head outside. Hard not to try de-doming the V2, but I like the beam….
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.