Yellow MH Bulbs

[Eduardo]

I also had that same problem. I bought mine from a LFS here in Calgary and exchanged it for a 20K bulb. Maybe a bit too blue but much better than yellow.

[Whatigot]

I have read on this forum that a halides spectrum can change rather significantly during the "break in period".

[brizzo]

Originally Posted by Whatigot

I have read on this forum that a halides spectrum can change rather significantly during the "break in period".

I know this holds true to security light metal halides lamps!

Another way to acclimate your new bulbs and your livestock, is to raise your lights and put a layer of black fibreglass window screen over the top of the tank. It lowers the intensity very nicely