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.
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.