I have a triple T8 strip light. It came with full spectrum 8000K tubes.
I'm wondering whether I should replace some of them by other types for
a planted tank.
How about leaving one in, adding one 6500K and one 5000K?

Also, I know that a lot of power compacts come with moon lights (LEDs).
Is there something similar that I can add to my setup so that I can
look at my fish at night (without providing too much light and
encouraging algae growth)? Will a regular black light work?

Thank you