I have a Plastic Hoop greenhouse I recently set up and am looking for advice on adding supplemental lighting. Starting off small, so my growing area right now is 4' wide X 5' long. I have a budget of 400$ Should I go for T5's...CFL's...Metal Halide...HPS...
Not sure exactly why you would want some more lighting if you have a green house? Is the greenhouse located in a bad spot outside or inside? HIDs are the way to go imo unless you have the perfect lighting which is the Sun then I guess I would use something a little less hot to keep temps in check