The problem is that the plants used to have a better growth rate (new
leaves often) with the old GE's

Interesting. A lot of people believe that actinic light causes algae. Your
experience would suggest that it's true.

However, you say the light is more intense. How so? Have you added more
light, or a better reflector?

And how long was your tank running with the old GE bulbs? Do you use any
fertilizer?



Leigh

http://www.fortunecity.com/lavender/halloween/881/