Help with Bulb Selection PLZ

I currently have Current USA Satellite 65W for my 20L tank. It's got a 10,000K/420nm Acitinic bulb that I'm thinking of replacing since acitinic doesn't help plants in any way.

Should I go with 10,000K/6700K bulb or a 6700K/6700K one? Which one do you think is more beneficial for plant growth?

And which one would look appealing to us (Doesn't really matter I guess)?

Please don't hold back on your replies.