Need advice building IR Spot light.

I’m putting together an IR light source for use with camera for night vision capability. I’m using 2 of these 100 watt leds 100W Infrared IR 850nm High Power LED Light CCTV Night Vision Camera Bulb Lamp | eBay
I’ve found this dual led heat sink with lens and fan https://www.ebay.com/itm/60-degree-12V-Led-Heatsink-Fan-Glass-Lens-for-20W-30W-50W-100W-High-Power-Led/252784809115?hash=item3adb26149b:g:nLoAAOSw3v5Yr5ko . My question is in the drop down section to select the lens on the heat sink it list 57mm or 44mm as a choice for the lens. I’m confused about this selection. Will either lens 57mm or 44 mm fit on my 100 watt leds ? If both will fit what difference would there be between the 2 lens sizes ?
Sorry for the long and dunce questions , I can’t get the link to the led’s to work but You can copy and past the led link and it should work, sorry for this trouble. I’m new at this and working on a very limited budget and trying to build because I can’t afford already assembled.
Thanks a ton for any and all help on this subject.

Edit To Say Question Has Been Answered in Another Forum.