Yes, the lamps are very good, but in my 15 years of experience as both a grower and a Journeyman Electrician, I must say there's no substitute for having both MH AND HPS present in a mj garden. I run both at almost all times...from beginning to end... I burn more MH than HPS during seedling and veg state, and slowly but steadily decrease the amount of MH and add more HPS during flowering, and at the last two weeks of flowering I blast the fuck outta everything with all I have, and that seems to be the best way to make Mary Jane come! lol! Seriously though, thatz the way to really soar above your peers and reach the floating mountains of Pandora, so to speak... That's where the biggest, knarliest, and the highest quality buds are born and raised, inside mixed H.I.D. spectrums....