"So many wrong".... Oh the irony. I don't think you understand what monochromatic means in the Young experiment or how it's applied. Two diodes of the same color next to each other are monochromatic, and the optic is tiny and hazy. Kessil 350/360 are absolutely 100% equation-provable lower quality lights, my reference is 2 years of upper division physics including waves and optics.
Locals here joke about how bad they are, to each their own I guess but the science is inarguable.
