High folks. I've got a few 400w hps bulbs that came with a pair of kit ballast sets. I'm running one of them next to a 400w dual spectrum bulb using a adjustable digi ballast. My question is about the light colour of the hps bulb. It is more white than the dual spectrum bulb! I expected it to be more orange like hps bulbs typically are. Is this whiteness a sign that the bulb has been well used?? Or is it just a variation of manufacture, like say more an industrial lighting spec rather than a horticultural one?? Hope this makes sense