Rbta need lighting info

[msjboy]

I have a gbta ( it has split 3 times, hasn't ventured off anywhere ) and its pretty good except the tentacles are not bubbled up... I have read this means they are trying to get as much light as possible. My tank is a RSM 130 with stock PC lights. Thinkin of getting a RBTA myself but I am concerned about in adequate stock lighting.

BYW, anyone have small recently split RBTA for trade or sale anytime soon?
I am going to get a supplement LED lighting bar ( ecoxotic one ) next week.
msjboy