For my DIY Picam's, I like to use quality parts than ebay cheapy 5mm IR led spots.
Made a simple USB connector, resistor, Osram platinum dragon led and 38 x 12 degree oval beam optic.
With just 300ma the 1Amp led lights up the room I was in fine, using USB power bank as source.
Need to make sw LED driver, 5V in, 1.5V out, full power led 1amp but only draw 300 or so from power bank.
GPIO4 has GPCLK0 ALT0 option, so it might be able to strobe the IR led at frame rate.
Strobing LEDS with short duty cycle means higher current for shorter time and lower heat issues.
Platinum dragons at 5amps
Should also make the red glow less visible.
For the long range, real install I have a triple optic 12 degree spot lens.
But it got me thinking,
Night vision system with Zero, IR LED, camera and small LCD, and DSL LCD view finder.
Powered from power bank, to make a handheld nightscope.
This will allow me to test various LEDS, currents and optics.
When I started playing with the triple optic it looked familiar.
Some of my LED GU10 mains down lights have similar optics.
38degrees for the triple, 60 degrees for the 4 Led, both would be suitable to re purpose as IR sources.
Perhaps change to 12V GU5/3 base so they can be used in garden spotlight cases.
I might be waiting a long time before a GU10 LED burns out so I can refit with IR leds.
Been using them for years and none have failed yet
Dragged out my only Zero and old 16GB SD card, I had forgotten I had Pikrellcam working on the Zero W.
Saves me wiring Ethernet, using Zero W's I only need power to them, 12V garden wiring?
Budget for security means I can get more Zero's
I'm dancing on Rainbows.
Raspberries are not Apples or Oranges