Which is better for my tank 250w or 400w, 14k or 20k?

[camellia]

JBDreefs;1061333 wrote: Holly, you didn't really mention it as an option, but I am a strong believer in Halides + supplemental lighting (LEDs or T5s). Doing a combo gives you the ability to add more light while avoiding some of the heat (lower wattage halides). Another positive of combo lighting is controllability for some sort of sunrise/sunset.

This is exactly what I do, MH & Radion LED.
I can keep water temp down with a fan in the sump and fan in the top of the canopy. Best of both worlds!