I have a Ultra fire C12 that venture _ of _ blood made a pure copper pill for I had 12 , mAH 350 7135 chips stacked braided +&- springs and mounted a xml2-U21a and I thought it was decent so me with my intelligent decision decided to get more throw, to use the gasoline method to De - dome it and it now has a terrible green tint so .I am wondering if it is the the bin I picked and I should use a xml2-1c to get a little warmer tint? I do like the cooler tints to get more lumens but 8 don’t want a green or purple tint.
Any idea on what causes the green tint?
I think de-doming should make the color warmer, that is, more the color of the phosphor, rather than the blue of the diode proper.
That is because the dome helps the light escape, rather than reflecting internally and having another chance to be wave length shifted by the phosphor.
You took a layer of the phosphor off the LED when you dedomed it. When you do this is has a horrible blue or green tint shift. Basically the LED is trash unless you like that tint
EDIT: Here is an example of a MAJOR blue shift
This dedome was not done in even a remotely careful way. The dome was flicked off with a sharp knife so a LARGE layer of phosphor was removed Your results will vary but this is the extreme
the greenish tint, so how do I prevent this from happening again when I try to de-dome? I used gasoline method and the dome fell of on its own I the bottle I have dedomed about 6 less and this is the only one that has come out this tint.
The technique of how you do it, how well you can dedome, the products you use, etc……
LEDs are not meant to be dedomed, you are basically trying to rip apart a LED, phosphor gets ripped off sometimes, cant help it
I’ve done like up to 10 LEDs dedoming by using gasoline and so far I have them 100% successful. Not sure about the green tint though, my eyes are not that picky probably.
I never had a problem until this one build and I was wondering what should I do different or if I should even try or leave stock? Thanks
If u are sure the de-doming went correct, could just be the tint raffle lottery - could have had a off tint 1A, or a mis-labeled one. There's quite a bit of variations. Some guys are doing cherry-picking on emitters now to get the tint they want. 1A, or any tint, just means it turned out to be in a certain range - could be on the edge toward neutral or a greener tint, then de-doming really brought it out. Amps, reflector, glass may have an effect as well.
Yeah this happened to me once on a cheap C8 with an XML, the previous tint was cold white probably 1A as well, and after dedome it was shifted way off to greenish side.
The emitter met with an unfortunate bond-wire accident afterwards. No, not “accident” with a quote… 
real accident when installing the reflector. Honest. 
There’s no problem with the dedome. I do other 1A with tint shift more towards neutral or very slight yellowish. So I think it is just something you play lottery with.
Well I don’t feel so bad now just have to scrap the sink pad and emitter. Just wondering how much throw I’ll actually gain over domed