Are all hps bulbs the same? I know there are different lumen ratings however, the cost of the higher lumen bulbs seem disproportionate. Any advice would be greatly appreciated.
The Philips son agro 430 and hortilux bulbs have more blue spect. and can be used all through grow... also there are horizontal (hor).. vertical (BU, base up) and universal (U)..
In my first grow I used cfls, 6500k for veg, and 2700k for flower and got good results but I've realized you can't deny the power of hps for flower. I just want to be sure that I'm getting my money's worth with a 70.00 bulb when there are some out there for 13.00.