Then yeah, I wouldn't worry too much about it unless he starts getting sick or developes stress lines.
When my Betta gets bored he finds things to flare at like the snail, shrimp, filter, heater, a plant, me. Sometimes they just like to show off. It is only a problem if it is endangering their health.
Give it time, eventually he'll get used to lights out = time to sleep. You'll probably start noticing him heading to his sleeping spot before you even turn the light out.
Last edited by Malvolti; 12-22-2010 at 11:52 PM.