[PART 1] Official BLF GT Group Buy thread. Group buy officially closed! Lights shipping.

[JasonWW]

@henningap

Hi all,

i have one question since weeks now. Sorry if i missed it.
If we mod the light with an XHP70 why will the throw go down to nearly half of the way?
I would assume that this LED has the same or nearly the same light density as the smaller one?
Then the throw should be nearly the same but only with a bigger diameter??
Or is it an older type of LED with significant lower LM per mm2?
thanks,
Henning

I don’t want to get too off topic, so I answered here.

My Understanding of Emitter Die Size in Relation to Throw

The density is about the same (xhp35 hi at 490 lumen per square millimeter compared to xhp70.2 sliced dome at 509 lumen per square millimeter), the problem is the size. To get long distance you need to make a beam of light as parallel as possible. If the light beam is cone shaped, of course it spreads out and you lose intensity. Lasers are very parallel which is why they go such long distances even though they don’t have to be very bright. So keep that in mind. Now with a reflector based ligh…