I got some MH lightbulbs and they don't say if they are 4000K or 5500K, is there any way to tell the difference??
I know (think???) that 5500K is better for veg, but I think that the MH Lightbulb is 4000K....
If it is 4000K, does it work good? Does it work at all? Is there any way I can complement with some CFL or HPS?
Please help, we are desperate :(