Screw-in bulb or double ended bulb for a 150w metal halide ballast?

[Mykiss]

Oh, and it's a magnetic ballast

[Veng68]

look at the ANSI number on the ballast....... it should say M81 for 150 watt.

I don't think a regular magnetic ballast would work for double ended.

Cheers,
Vic [veng68]

[Robw]

Here is a good read about ballasts and MH lights. Answered a lot of questions for me.

http://www.reefkeeping.com/issues/2007-03/sj/index.php

[Mykiss]

thanks!
I'll give it a read.

[KrazyKuch]

If it says it's a M81 then yes but if it says M107 then no

[Mykiss]

thanks Kevin. I'll checkit out tonight.