DIY metal halide question

[bergamer]

I want metal hallides, but dont want to spend the money.
I found this:
Product Description
250 Watt Metal Halide Ballast Kit Multi-Tap Ballast 120/208/240/277 with 250W Metal Halide Bulb Mogul (ED28) Base ANSI Ballast Type M58 & Mogul Socket. SHIPS IN ONE BUSINESS DAY.
Product Category: Ballasts
Case Quantity: 1
Units in Stock: 50
Your Price: $71.95
can this unit be used ona fish tank?
and why is it so much cheaper than other versions preferred by marine aquarists

 

[jasenhicks]

Its probably a magnetic ballast, and a very low temp bulb around 4000K maybe. THis is unsuitable for a reef tank. You need at least 10000K for a reef tank. Magnetic ballasts can be noisey, hot, and bulbs dont last as long. It also doesnt appear to come with a reflector.

 

[acrylic51]

Yeah it's the M58 ballast and yes they can be quite warm, have used them in the past and never had an issue with noise, maybe a slight hum, but hardly noticeable, but have to strongly disagree with the bulbs not lasting as long.....Where's that info come from?????? Maybe you have it confused with overdriving a SE bulbs with an M80 HQI ballast???