Most efficient throwy emitters?

[OrionLight]

Why is it that a smaller emitter results in more throw when compared to a larger emitter in the same reflector?

Edit: Nevermind. Found a thread with this question somewhat answered:

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…