I just got my first Luxeon’s in and I love them. Admittedly, I haven’t tried the 4040 footprint Luxeon V’s. But I just picked up some of the 4000K (tested) and 5000K (yet untested) V2’s (the 3535 footprint version) and I must say, I’m impressed.
I replaced a 4000K 70CRI V5? XP-L2 in a 3.08A Convoy S2 with a smooth reflector. Not sure where the battery is at voltage-wise, but I measured 1096 lumens for the XP-L2. I swapped in the Luxeon V2 and measured 1054 lumens, only a 42 lumen difference. But the beam and tint and tint consistency is spectacular. No green, no yellow, no tint shift. Just bright, beautiful, creamy white. Oh yeah, a new favorite. And they were < $2 each. And fit on a standard 3535 board. Heck yeah.
Beamshot, though I don’t feel that it does justice to the Luxeon V2
Left to right: Convoy M1 with 70CRI XP-L 5000K, UltraTac A1 with 90CRI 219B (I thought 4000K but maybe not), Convoy S2 smo with Luxeon V2 70CRI 4000K, Wuben E05 with 90CRI XP-L2 80CRI.
It seems to be quite similar, but perhaps not the same. I’m anxiously awaiting proper tests. Anyone care to volunteer? Djozz? Texas Ace? Koef3? Maukka? I’d probably donate some if there’s interest.
Comparing two Convoy S2’s side by side; one with LH351D and one with Luxeon V2, the throw of the Luxeon V2 kills the LH351D. But that doesn’t take much, the LH351D is a very floody LED.
I’ve had a lux meter (UNI-T UT383BT) for about a year, but had never taken it out of it’s package until today. I tested just a couple lights before running out the door this morning, and unfortunately I didn’t have quick access to the Convoy S2 with LH351D in order to get numbers on that; hopefully I can tonight. Here’s the 3 I was able to test (so you have something to compare against in case my numbers are skewed):
Convoy C8 with 3.08A Qlite and XP-L HI V2 5000K: 2818 lux at 5m → 70,450 lux
Convoy M1 with 3.08A Qlite and XP-L V6 5000K: 755 lux at 5m → 18,875 lux
Convoy S2 (smooth reflector) with 3.08A Qlite and Luxeon V2 4000K: 549 lux at 5m → 13,725 lux
Do those numbers sound right? Since these aren’t real throwers (perhaps with the exception of the C8), should I measure at 3m (or even 1m) instead of 5m?
Without being scientific it does appear to have more throw than a LH351D but with the dome on I don’t think anyone would consider this a thrower. Not sure how it performs dedomed and I think thus far only gchart and I have even tried them in a flashlight.
I have a C8F with 3x Luxeon V and when I compare it next to a LH351D of the same type there isn’t a huge difference in the overall beam. It’s a more intense hotspot but not by a huge amount.
If I’ve got time tonight I’ll try getting side-by-side numbers with the same flashlight setup using Luxeon V2, LH351D, XP-L, and XP-L2. I’ll see what else I can scare up, maybe a XP-G2, XP-G3, SST-20, XP-L HI. I’m pretty sure I’ve got all of those on hand, it’s just how much time I’ve got to swap in and out a bunch of different LEDs.
Here’s a mechanical comparison of the domes of the SST-20 and Luxeon V2. SST-20 is quite a bit smaller in all dimensions and LH351D is slightly larger in all dimensions.
