Mytag wrote:
Hi, I have a 48"X18"X12" heavily planted tank. At present I am
running a
150watt MH light with two single 30watt fluros.
The MH is apparently 5500K and the two fluros are 6000k each.
What I would like to know is if I go to a higher rated Kelvin for the
MH
will it affect the plants too greatly? And what rating do people
suggest?
The 5500K MH throws off a yellowish/ orange colour and Id like to
have a
more whiter colour in the tank, as it sometimes looks like the plants
are
growing in pee!!! (LOL... I hear you!)

Long story short, NO.

The color temp will not affect plant growth. The only difference is
how it appears to the human eye. If you don't like the color of the
5500k bulb try a 6500k.

Nick