I need to select LED/LEDs for a light source in my project. The requirement is that the light source should approximately be able to project light beam of 1.5m diameter on a surface, from a distance of 1.5m. The incident light should have lux equal to 1500. How do I go about selecting the LEDs for this application? What factors should be considered?
This site has a lumens to lux calculator, given beam angle and distance.
Looks like ~2300 lumen would yield ~1500 lux at 45 degrees and 1.5 meter.
Might look at "tactical flashlights" like these and see what kind of LED & lenses they use to achieve 1300 lumen, go from there, use 2 of them kind of thing.