Cannabis doesn't need a 50/50 mix of blue/red light like the bio tropic puts out. During veg it actually uses more blue light than red. This is why you supplement with the bio tropic and use another color bulb to provide more blue light. You use the red to start flowering b/c it will kick start the cycle then later add the bio tropic to get the best spectrum. You run bio and red together and your peaks are at 615nm 665nm and 440nm which is a GREAT spectrum for growing, way better than any HPS on the market