A DTP board will always heatsink better than the board from the OP, but only work with leds that have a (neutral) central solder pad.
The OP board fits all leds that have just two solder pads for cathod and anode without central solder pad. And there is not so many leds that fit it that are interesting in flashlights, it is an obscure board!: almost all midpower leds have the two pads but are too dim for flashlights, a series of Nichia UV leds fits this board, Luxeon Z fits it, and with some scraping the Nichia 144A series fits it.
Maybe it’s not (only) the dielectric layer that is better than usual, but it may well be (judging by the picture) that the copper layer on top is thicker than usual.
I was thinking XQ-E, but they’re probably too small for that.
…and the gap between the solder pads is smaller so there is more copper directly under the center of the led. (I did not ask specifically for an extra thick copper layer, and have to look up what thickness I actually got)
I mean, the djozz board versus the generic board. I know the copper core weighs more than the aluminum one. I’m wondering how much difference there is. Just curious.
I’m sorry Lexel, lots of things going on on BLF today, and then there is a life too (work, shopping, making dinner, reading book to my son, comforting him later at night when he wakes up with bad dream).
I will go through my PM’s now.
Sorry for the long wait Lexel, finally replied your PM.
(for doing practical work on the hobby I have monday exclusively atm, busy with work, family and St. Nicolaas festivities, just catching up with hobby administration today)