Yep, think that's it, I'd say they all describe where the light is in the rainbow, which parts of the electomagnetic spectrum are produced by that light.
williboy Reviewed by williboy on . Lumens, Etc. What is does nm mean in reference to lighting? what does it shand 4? I'm 99.999999% sure it has something to do with the spectrum or color band or watever it's called (inform me on the correct term 4 that 2 please). For example, 400 to 520 nm is where you see violet, blue, and green. which promotes vegetative growth.) Also, i know almost nothing about lumens. if wat i think i know is right, then it measures the intensity of light. n the more, the better??? please help! so confused. Rating: 5