I have an LK04 XHP50.2 quad - it's 3 cells but still a lot in common to the Q8 form factor. There have been Q8 quad XHP50.2's mods done - it is a nice upgrade but I'd consider a bigger, wider head and max out the reflector cup widths to boost throw - don't think there's quad XHP50.2 lights out there in the 60-70 mm head size . Like djozz said, the Q8 offers that nice combo of flood and throw and flooders are common already.
Still like the single LED thrower head though - actually a bump up to 90-100 mm head diameter would be ideal. The 4P batteries and the heft of the Q8 design would make a decent host for a SBT90.2.
So a quad XHP50.2 Q8 in NW if possible, little bigger head, bigger reflectors, and a even larger head for a single LED like the SBT90.2. Those two options would be great! I realize of course the cost/price goes quite a bit up.
Let’s try the 9x LH351D… This would be a bit similar to the Fireflies ROT66 gen 1 which has 9x LEDs, but Q8 has bigger body so should be able to handle more heat.
4x XHP50.2 = there’s the Haikelite HK04 that uses 4x XHP50.2, not sure how well it is though… But XHP50.2 seems to produce some “artifacts” in the beam, so I’m not sure if 4x XHP50.2 on the Q8 will also have artifacts or not… 4x XHP50.2 would also be a floody light, wouldn’t it?
I wonder which will be more floody, 9x LH351D or 4x XHP50.2?
I'm not dead set against a 9*351D of course - it should be more floody than a quad XHP50.2, but somewhat dependent on the optics and what 351D bin is used. As d_t_a said above, it should handle the heat better and have more a better power source (4P batts) than those more compact multi-LED lights out there.
Yep agree, it is what it is. The whole great tint, great beam thing doesn't apply too well to these XHP50.2 3V's, but they do put out a ton of light. XPL-HI's are still my favorite for good look'n beams, while for tint, there's a bunch of choices for low output great tints with various pros/cons.
Yep I agree with that. My modded XP-L HI and XHP35 HI are my favorite Go-To lights… (sure I have a few CRI orange and pink pocket fondlers (EDC) lights) Meh there ok for close work.
I did a Q8 and SP36 with Hanks XP-L HI V4 3C’s I like the tint and the throw…
I'm ok with the ~NW on the right. The blue spot on the left one looks bad, but again, that's white wall stuff. It's pretty much expected. Those Cutter LED's actually look very good - wish they were easier to come by.
I have talked to Barry about the idea to testing Q8, SP36 or C8F with Osram White Flat 2mm², i.e. CSLPM1.TG. This would of course require changes of the MCPCB‘s footprint, gaskets and possibly on the driver using FET, too. But maybe it’s worth the effort, having approx. 4x 1.200lm with a big boost in candelas/lux compared to XP-L HI.
For the driver, there's problems. High amps but amps must be restricted - not an easy or cheap combo to do. Figure for a Q8 or SP36, 5A per LED, 20 amps, but no more than 20 amps. Hhhmmmm.
14 7135's per LED, 56 7135's, or better to avoid 7135's and go with a driver like Hank uses with the K1, only circuitry x 4, tricky, expensive, space problems.
If I recall correctly Lexel once had a Q8 driver with only 7135 AMCs but without the MOSFET. Maybe I‘m just mixing it up, not 100% sure. How about using 3.2V LiFePO₄ batteries only? Certainly, this would leave a high risk that the customer inserts 3.6V standard lithium ion batteries by mistake.
Can White Flat 2 be driven to more than 5A, like 8A? I thought this 5A restriction would apply to White Flat 1, only?
The PITA to center the WF1's and WF2's is lack of a proper centering ring. In a production light, should be easy to have the proper centering ring made, then problem solved.
For amps, yes - the WF2's can take more amps but still have the same problem - to restrict the amps. Could of course use unregulated FET with proper resistance to restrict it, maybe use 35E's or GA's to help out, thinner LED wires, etc., for example. There's options there with a FET I suppose. I do it with my own WF1 mods, but it's a pain to keep in mind the battery you use though.
I guess someone should test out quad or triple WF2's in a host and see what amps you get. SP36 could be better because of 3 cells per 4 LED's, C8F better still - 1 cell per 3 LED's.