what type of MH bulbs?
 

I just bought a MH setup for my coral tank at the shop and it currently has the geiseman 14 k 250 w.
what kind of bulbs would people suggest?
are geisemann bulbs good?

I am on my third set of Giesemann bulbs. I just changed them last night.

Myself, I dislike geisemann bulbs. I find them to be very yellow.

I have currently running 14K aquaconnect bulbs on my display and 14K EVC on my grow out and really like the colour of both bulbs. Neither, IMHO really need actinc supplements.

I'm running XM right now, but am looking at changing to Ushio.

This might help you in selecting a bulb.
http://reefkeeping.com/issues/2007-04/jb/index.php

Hi Lando

What photo period do you run and how many months do you go between change out?

Tom R

I like Hamiltons but I have a brand new set of Aqua Connects I have to change out now that I see the pics I like the color

It depends on which ballast you are running as well. Some bulbs look great on one type of ballast and gross on others. (i.e. Radium bulbs)

it is a year old 72 inch Coralife fixture 250 W DE bulbs.
I am assuming that it would be electronic ballast

8hrs/day, I try and switch at around 10 months. Then I have spare bulbs with a little life left in them in case something happens.

I started with hamilton 10k. that came with my 250w reefstars. Crap bulb. very yellow. Then Geismann 13.5 k. then Xm 10k . all with VHO actinics. I now using Phoenix 14k with my blue vho actinics, and as of right now have never been so happy with my tank lighting. Awesome colors , hint of nice blue. When first fired up they were really blue but after 2 weeks they are perfect. Try them...