X-ML de-doming method with 100% success?

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. :smiley:

Looks like the tint definitely got better.
Are colors like that in reality also? :slight_smile:

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.

http://www.taschenlampen-forum.de/attachments/fritz-moddings/11929d1349208384-throwerkopf-47s-x10-arme-00028986.jpg

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. :wink:

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

340 KLUX >)

Xandre

What do you think would be the effect of dedoming a UF980L?

I dedomed it (dropped the whole pill in Acetone over the night) and the spot is certainly smaller now. Brighter.. I dont know. Have to wait to get my camera back so I can take some beamshots.

I just dedomed my X6 out of curiosity, feeling satisfied with the knowledge that I can just easily put in another SST-90 if I don’t like the outcome.

This is an SST-90 btw:
It now has a pretty yellow tint, quite ugly but I’ll see tonight how the colour rendering goes.
It now has 870 lumens (calculated form ceiling bounce against my 7g5-v2).
It now has 67k cd. At 2 meters, the X6 has a bigger hotspot than the 7G5-V2, but further than that it becomes smaller.
It was probably the easiest dedome job I have ever done. This really is close to 100% success rate as the whole dome just comes off.

I now have been motivated to mod the driver again. Huzzah.

Did you measure lumens/cd before mod?