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Old 02-06-2007, 07:03 PM   #1
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MH & HQI Lighting

A few questions regarding MH lighting.

What is the difference between MH and HQI lighting?

Are 150W HQI comparable to 175W or 250W MH bulbs?

Other than the obvious, what is the difference between single and double ended bulbs?

chase33 is offline   Reply With Quote
Old 02-08-2007, 12:21 AM   #2
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Single ended or mogul socket bulbs have a screw in base. Doubled ended are HQI bulbs and don't have screw ends. The ends of the bulb just slip into the fixture. I am not an expert here but I don't think single ended bulbs can be HQI.

HQI or double ended bulbs have to have a UV shield where the single ended bulbs do not as it is built into the glass.

I have heard that HQI are brighter but not sure really. I have a 150 HQ over a prop tank and I use 250 watt single ended bulbs over my display. No comparison for output here.
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,
ellisz is offline   Reply With Quote

hqi, light, lighting

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