hi. i'm kinda new to this, although i've read a bit about planted tanks. some of my plants are melting, i just got a co2 (electrolysis) unit, but i'm realizing that my current bulb is a coralife 10,000k and it seems like i need a lower kelvin bulb. the lfs said that the lowest they have is a 6700k bulb. is this okay for a (soon to be) heavily planted tank? is it gonna be much difference to my 10,000k bulb? thanks