Buying/Building a 5x3 array of Oslon SFH4715S for a very clean ~10° beam and powered by 4 or 8 18650s

I’m trying to get a clean uniform IR light for a Sony nightshot. IR intensity, beam angle and cleanliness, lightweight are my main concerns, not cost. Should be able to recharge batteries using a solar panel.

I suppose I would need a very good (and rain proof) heat sink case to output that ~10°beam angle. Perhaps something like 60-degree-flood-beam-45w-3375lm-6000k-15-led-white-light-car-lamp-black-dc-10-30v but with a narrower beam and lighter weight?

For LED arrays is Oslon SFH4715S the best choice or would LED ENGIN or other brand/models be better?

Options so far
wildlife IRLamp6 12° 10200mw/sr 10.6oz ~6W
Axton AT-8A 10° 240’/73m 10oz IP67 (12-36)VDC 8W
Iluminar IR919-A10-24 10˚ 919’/280m 3.9lb (12-32)VDC 52W
Maxa Beam Searchlight 1°-40° beam, 3.3lbs, 12 000 000 CandlePower, Visible Range 3500m, Infrared Range 1400m w/ 850nm IR Filter

Anybody has any idea if this is useful for me 智能交通补光灯 ?

I’m also considering converting a multi-emitters flashlight as I posted here

Maybe 4x3 LEDs or even 4x2 would be enough light if they are well focused… I guess the bigger problem is to get that fairly narrow beam without getting hot/cold spots?