Hello everyone first post here, was recommended by jack middelton from another forum and heard nothing but good things about you guys so i thought id shoot a question and see what you guys think. I currently have a 55 gallon freshwater no special substrate just sand. right now my lighting is just 30 watts total between two tubes ( i know its not much). i found a very very cheap 4 bulb fixture that will go the entire length on my tank. i have read that plants can adapt to any light aka "Kelvin" and that it just takes a week or so for them to adapt. I have also heard that plants can ONLY use red and blue to go through photosynthesis. But on the same token i have read that plants are more sensitive to blue and red and DONT need this to be happy and grow. Now my question is if i were to get 2 tubes that were 40 watts a piece around the normal 3000 kelvin household light would this be ok for pretty much all plants? or do plants really need those expensive designer tubes?