I vote for the LT design with the lantern logo. I think it’s far enough away from the actual GT logo with lumintop’s rabbit to be worrysome.
However, if it makes everyone uneasy with LT being possibly confused with Lumintop, then how about BLF-UL (Ultimate Lantern) or BLF-ULP (Ultimate Lantern Project).
The BLF-GT logo was made up here on BLF, including the idea of putting the rabbit in the middle so it is not a Lumintop logo at all. It was derived from the BLF-Q8 logo that was also made by a BLF member
I really like the BLF Lt Logo, also I would support the use of 3000K/2700K&5000K LEDs and what speaks against increasing the output to around 1000lm ? Sure are 500lm enough in most situations, but 7135 chips are cheap and the the LEDs would support the higher output. In the worst case we would need to add some cooling fins to deal with the higher heat generation, but that’s no big deal and sometimes the higher output could be handy when you need to light up the whole campsite.
About 2700K vs 3000K, last I checked, the 3000K emitters go one efficiency bin higher than 2700K. So 3000K would probably be about 6% brighter than 2700K. They’re rated at 340 lm vs 360 lm, while 5000K is at 400 lm.
So, that might be a consideration.
2700K + 5000K: 17.6% brightness difference
3000K + 5000K: 11.1% brightness difference
Aside from this 11% or 17% difference though, the brightness should stay constant while changing tint.
As for the tint adjustment, there should be up to 255 steps along the tint spectrum. At least at full power, the top of the ramp. Lower down, the tint resolution gets more coarse because the numbers are smaller. At a low power level like 20/255, there would be only 21 tints available. And at a super-low level like 5/255, only 6 tints: 5/0, 4/1, 3/2, 2/3, 1/4, 0/5.
So the bottom of the brightness ramp might skew color sideways a bit as the resolution gets coarse, but I doubt it’ll be noticeable during use.