To much light?

[StirCrazy]

Hi I was out all afternoon looking at lights and the cheepest set up I found was a 400 watt 20000K Mh and balast. I was hoping to find a 250 watt 10000K but no luck. so would 400watt be over kill on a 33 gal tank? and if not would 20000K be to blue or would it be fine?

Steve