light bulbs
 

I have the coralife fixture with the 4 bulbs and lunars ,when I have to change the bulbs, how often should this be done ? Can i use different manufactor other than corlife and if so which bulbs give great color ?

bump, looking for info please
or if someone is using that clamp on 150 watt hqi by coralife also need info on this.

I change my PC bulbs once a year. I think you would be able to use any manufacturers bulbs... Just make sure you get the correct pin configuration...square of straight

Note I only use pc actinics for color

any suggestion I have not looked around at other bulbs yet
thought others may know what gives good white clear (other than MH) and other. color.