I think that is what Z said... went to inside sun...I was blowing off going there, because I haven't been in the market for lights... but I am going to have to redesign my light system before next grow...
after reading the specs and about the bulb...it has an enhanced blue and green spectrum's. your blue green is the veg spectrum, yellow amber red for flower...like autumn
so being an hps lamp it is amber for flower with enhanced blue green you can use during veg...and with everyone moving towards fluoros and cfl's for early veg; after that you have one light for the entire grow...I believe...maybe Z will come back and finish off this thread...hope this helps...latewood