I have this question in my head, gotta ask it even thou it may sound kinda stupid but I think you may understand why I ask.. Is having 2 * 250w MH lights equal to 1 * 500w MH..... (I know power consumption wise it is, just wonder if the plants react the same under multiple smaller light sources rather than one larger one.
Multiple light sources would be better than 1 big one, it would cut down on shadows and spread light better. However the more light sources tha harder it is to cool. But that's no biggie if you have a decent fan
Not necessarily, 600w light put out more lumens/watt than any other watt hps, therefore it would be more efficient and effective, for instance, to use 1x 600w hps than 4x 150w hps