With the 91K resistor on the switch LED’s and the new 20mm driver now having an SIR800DP FET on it, I’m still only getting 5754.6 lumens with the Klarus lens on and 6272.1 with no lens at all. So I’m nearly 1000 down from when I first built this light. In this instance, the lens itself is robbing me 517.5 lumens. Guess I’ll be getting an UCLp and see how that works out…
On the plus side, it’s working fine with the lighted switch.
Hey lads what KCD numbers are people getting from there L2? I measured mine at 270KCD but i am not expert at measuring distance. I shined it across a bay i was fishing at and i could see the light on a white house which is 1km away. It light up the reflectors easily but i was surprised to see it shine on a house.
Its hard for me to gauge distance i live on the coast and we stick out further then most of sydney so we cop all the wind this leaves a lot of water particles in the air. I have noticed if i do beam shots at my girlfriends parents although its a lake its like 30min inland and there isn’t much wind and waves so all lights shine better there.
Follow up to my previous post of L6 with TA driver w/ narsil v1.4. By Lexel. Previously the led had a very low glow with side switch in the off position & tail on. See post #227. Lexel thought it was a leaky 7135 chip.
Now I’m seeing this, batteries are at 3.9 volt ea. Wondering if there is a way to measure 7135 chips to pinpoint the culprit.
Regarding the glowing emitters while off, I think I know the cause in my case. Your cause might still be the 7135. I’m not sure of an easy way to check for sure other than removing the 7135 chip and seeing if the glowing stops.
I used all 7 emitters/MCPCBs from my 7xXPL L2 build to make my 7xC8 build, using a (different) FET-only driver with e-switch. Now only the first parallel string of emitters glows while off. So I think there must be a high-resistance connection from one of the LED negatives to ground. In my L2 build I must have had this one LED in the second parallel string, which made all of the emitters glow. In my current build that one LED must be in the first string (from positive), making just the first string glow.
Wow, thats odd. Maybe Lexel should replace it? I know it’s only $25, but I’d be pretty upset. If he sent you a new one and you sent the old one back to him, he might be able to remove all components and reflow them back on (using new 7135 chips) then he could simply resale it to another person so he doesn’t lose much money.
Modded the H2-C driver with a R030 sense resistor to output 2.37A to the XHP35 HI E2 3A emitter. (see this post and thread for info on modding this driver) I filed down the edges to make it fit in the L2 driver space. I could not get the output to be stable at this level with 1s input, so I’m using 2x26350 cells. These cells are a bit too long for the L2 single tube so for now the battery tube is not completely threaded into the head, to make room for the cells.
I measured 250Kcd at 6m. I was comparing the L2 w/XHP35 to my fandyfire SP02 with dedomed XPL V6 1A, which does 243Kcd with a fully charged 30Q at about 20s. The SP02 has the same reflector as the HD2010 and Mitko’s BLF style thrower. Based on a ceiling bounce test the L2 has about 30% more output. The two beams look very similar. The L2 hotspot is very slightly larger with a larger corona.
So, a pretty good result, but not a huge performance increase over the dedomed XPL V6. The boost driver/XHP35 setup also uses quite a bit more power, about 60% more from the cell(s).