All you really need is bright white and warm white, if you add some red and IR is nice. Thats how LEDs are configured nowadays, cool white, warm white and reds. Sometimes the ocasional UV chip. So if you can get it with HPS why not, using the LEDs all for cool white is a good idea because its the most efficient chip and has the wider spectrum, more blue than red but thats what the warm white is there for. Nice set up.