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#1
07-18-2006, 05:39 AM
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MH Bulbs???
How do I tell what kind of MH bulbs I need.
Sounds like a stupid question, but I have no idea what type I have..just that they are 400 watt. How can I tell what type they are? thanks Neal
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Way too much time and money has gone into this hobby....and yet, I CAN'T STOP 
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#2
07-18-2006, 06:41 AM
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There should be some markings on the bulb... if not they're probably hydroponics bulbs, which CAN be used for a reef tank but not optimally. You want at least 6500K bulbs if not 10,000 up to 20,000K bulbs...
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135G Mixed Reef. Bullet 2, 25 gal refugium, 2 X250W MH + 4X 96W PC\'s, DIY Calcium Reactor, Coralife 1/6 HP Chiller, Phosban, Tunze, 2 closed loops & SQWD\'s, Seios, Coralife 4 stage RO/DI & a bunch of other expensive gadgets... I may never retire, but I'm gonnahavahelluvanaquarium!
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#3
07-18-2006, 03:31 PM
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To find out what kinds of bulbs you can run, check your ballasts.
There will be some numbers on it. M59 is a 400W probe start. M135 is a 400W pulse-start. Pulse start ballasts have transformer, capacitor, and ignitor. Probe starts only have a transformer and capacitor. Then you have to match your new bulbs to the ballasts.
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