jack--sos

Has anyone used these before? Can you use these in the same way as flouresent tubes? as in do the use the same fixtures? is there still a size difference, pretty much can someone give me a crash course in Metal Halide lights, or a good link to info about them.


also can any flourecent tubes be used for fish tanks, because i jusy found a 100w tube in
B&Q for.....£5.47 :O is it too good to be true? or do they have to have special qualities to be used in fishtanks?


Thanks
Jack

mathas

The short answer is they generally have specially-designed fixtures, as they tend to run hotter than other types of lighting at a similar wattage.

There's a bit of information about MH lighting here. Saltwater forums would also be a good resource.

You can use any bulb you want, as long as your fixture supports it. Having a 100W bulb does not mean you get 100W of light... that's controlled by the fixture or ballast, not the bulb.

Now that said, some bulbs are better or worse than others for tanks, but there's nothing I'm aware of that would stop you from using any bulb your fixture supports.