Mr Scott
Mention that the KD 5700K variant is a 219B, while the 219C has a lower Vf, which gives you more lumens at a low current, thus less heat.
Also mention that the Carclo optics wont fit directly in the KD DTP’s (which are only 1mm, and somewhere on BLF i read that sometimes the MCPCB’s aren’t 100% flat)
The heat warning depends on the current you want to drive the LED’s with
I bought the Bistro driver with 8x7135 which should give approx 2800mA, with the LEDS in parallel that is 930mA per LED. Since the 219C’s have a low Vf they are driven quite efficient and the heat should (I.M.O.) be on an acceptable level.
See TexasAce’s test here:
” Nichia 219C D260 9050 90+ CRI Emitter output test by Texas_Ace”:Nichia 219C D260 9050 90+ CRI Emitter output test by Texas_Ace