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- Use 175W bulb with a 175W Magnetic ballast ANSI code M57 or 175W electronic ballast
- Use 250W bulb with a 250W Magnetic ballast ANSI code M58 or 250W electronic ballast
- Use 400W bulb with a 400W Magnetic ballast ANSI code M59 or 400W electronic ballast
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First Metal Halide Experience By Sbappe on 8/21/2016Sbappe wouldn't recommend this product to a friendI don't have anything to compare it to since these are my first metal halides but I have no complaints at all. Corals and anenomes seem to love them and they don't seem to be getting as hot as I expected halides to get. Easily controlling the temperatures. The color is really nice. If I were using these as standalone I probably would have liked a little more blue but with my Rapid DIY leds in there as well it's all dialed in just to my liking. Having used only LED before, I saw extremely fast improvement of coral coloration and health. I was shocked because I wasn't really a believer in all the him-haw I've heard about halides but I don't plan to be ditching them for something else any time soon now!
metal halide 20k single end bulb - hamilton By Chuck on 4/29/2016Chuck would recommend this product to a friendThe bulb was the exact replacement, for the bulb I had. It is bright, have no way to measure watts output.
Nice By Joey J on 11/12/2015Joey J would recommend this product to a friendJust got the bulb today. I decided to give Hamilton a try instead of the usual Radium's. I popped it in and fired it up and compared the color next to the other light I have with the Radium and the color is pretty close. Nice whitish blue, but just a little less blue color to the tank. Verdicts still out because the lamp needs to break in but so far so good. I wanted something a little less blue and I think I got it. The Radium's are great but sometimes I think it could be a little to much at times.