The t5 ho (high output) produce the most lumens with a low power draw. I use a 4’ 4 tube fixture that consumes 220w from the wall. I use this light to grow plants from start to finish. I start with 3 6500k bulbs and 1 2700k and leave them in until after the stretch and then change to 3 2700k and 1 6500k for the remainder of the flowering period. It works well in my situation. Keep the fitting close to the tops of the plants and they will be short and compact. good luck.