Chaz88;4844325; said:I was wanting to go with lower light plants and light fixture for budget reasons and because I was thinking that piranha prefer lower light. What would you recommend for lighting? I don't want to mess with MH or high pressure sodium, but would spring for t5 or similar if it would work better.
Wish the price of the new LED technology would come down, would make the energy cost and heat dissipation feasible for just about any light output you want.
the light required by plants is very different that what we see with human eye.
what looks bright to you may not produce enough PAR for plants.
Here're some charts measured using PAR meter so you get an idea what light will be good for your tank and plants. use these as reference as different plant will be at different distance from your light.

