it would appear three year old english two stroke mix works fine, just had to flick the dome off after an 18 hour soak ( no reason for the long soak other than its when I got too it) need to do some testing and build this up into my own l2 with another 5a driver then I can test back to back domed xp-g2 vs same bin and tint dedomed xp-g2.
I bought some methylated spirit to clean the star with, google says this is denatured alcohol which is what others are using to clean, it has been airing for 5 hours now while I do family stuff so we’ll see.
my dedoming bath is a nescafe jar, four small holes in the lid and chefs string to hold the star.
on the domed 5a xp-g2 r5 2b I get a reading of 244 in the 20000 range (times reading by ten) measured distance was 6.5m and cells were reading whatever after last nights testing (didn’t measure, more interested in testing the lux meter and seeing if the sums seem right).
so, a forum search gave me the sum
lux =reading x dsq
lux =2440 x (6.5 x6.5)
lux =103090
can someone give those a look see? I’m not saying this is it, the meter is very cheap, a hs1010a but will do for now.
I’m now charging the keygos cells to compare the 3a alu mounted xp-g2 3d (unsure of bin) then I can get to fitting the dedomed xp-g2 r5 2b and 5a driver in my l2.
Also how do you get distance from this calculated reading?
I’m happy with the calculated reading as it seems to be in my expected ball park but its in no way an ansi rating.
ok. tested the 3a nw on my charged keygos cells, same distance and sum as above,
181 on the meter
calculated to 76472.5
dedomed xp-g2 at 5a (yep, I built up the 3a one to 5a dedomed)
336 on the meter
calculated at 141960
these were both on my crappy keygos cells, I was intend to retest on trustfire flames and king kongs.
no photos or anything, just wanted to get it testable. Our luke is quite poorly and we have the mri scan on the new baby tomorrow, my heart is not really in it.
I’ve only taken readings from 1m, but with pretty much the same setup (L2, de-domed XP-G2, LCK LED FL-235 Driver), my meter is showing 1410 on the highest setting (200000).
Interested to see if it’s in the same ballpark as yours at that distance. I know a thrower should be measured from further away - I’ll have to get someone to hold the meter & take the reading for me…
I had the light sensor set on a shelf, the light on a chest of drawers resting on some folded trousers so there was no shaking, just adjust to get the best reading, leave it a bit (my readings were taken at well over 30 seconds from turn on). I’m testing in my garage so I don’t think the spill was affecting the reading as I could lower the reading by moving the hotspot about. I also don’t know if my meter under or over reads and I’m now convinced the keygos cells are holding it back, more testing but tonight was mostly about getting a feel for the meter and testing to see if the dedomed emitter worked and was an acceptable tint, if I get it to throw like hell all the better.
awesome, that’ll make a real long runtime thrower, I think the 5a driver I’m using will take 3 cells too. might have to order one of them for testing.
I’ve hit the work wall again this week, 14 hour days and a young family are not condusive to modding, should be back in the shop tomorrow though for more testing and starting assembling the next iteration of this. Dedomed xm-l2 u2 is the next test emitter, just wish my dmm could have been repaired, going to have to buy a new one, along with a soldering station ho hum.
Good to see the extension tube fits, thanks Ouchy. If I had seen this this morning, I would have thrown one in with my order of 2 KK26650 ICR’s…
I rolled out the tape measure in my brand new (& still empty) shed just now to take a longer reading from my L2 with 5 amp driver & de-domed XP-G2. The cells are only TF flames, & not fully charged.
I measured @ 7 meters, & on the 200000 scale I got a maximum reading of 61, after waving around in the hot-spot for about a minute or so.
I’m still coming to grips with doing the math/readings, but going from Gords’ post on the previous page, & with allan d’s help, I think it works out as;
lux =reading x dsq
lux =6100 x (7×7)
lux =298900
The square root of lux at 1 meter (candela) times 2 gives throw in meters to 0.25 lux.
So:
298900 = 1093 meters.
In comparison, my standard XinTD v4 pulled 32900 lux, 362 meters.
I really suspect my meter now, have you done any resistance mods? how have you located the reflector? I used the original xm-l locator as you get a lot of rings without it, what bin and tint xp-g2 did you use? what dedoming method? what driver?
Either my meter is amiss or I’m missing something as I’m getting stepped up results just very low ones and king kongs made no appreciable difference, certainly not 150klux difference.
No resistance mods yet - I’m waiting on some silicon 22 AWG wire from IOS to arrive.
See this post for a pic inside the head. I’m not using a locator - the reflector sits hard against the insulator disc. The copper tags are to get the wires out of the way to avoid a short, & to get the reflector as low as possible. I think the LED needs to be up higher still…
hmmm, I’ll try the copper tags and no locator then, as that is literally the only difference in spec between yours and mine I may try to relieve the reflector a little. hows the beam? I found it ringy with no locator but that was on a domed emitter.
Focus is certainly an issue in some lights. Especially with XP-G(2)s. The issue is normally getting the emitter as far as possible into the reflector. If you have highly visible annoying rings, then its probably not as far in as it should be. Getting the emitter further in normally increases throw and remove rings, or improves the beam. Do like FmC did. If that does not get the job done, consider doing some file work on the backside of the reflector.
