lighting overveiw range is listed from lowest lighting output to highest
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florescents NO=normal output 15-40w last 6-18 months* 3,000°-20,000°K; actinic Wide range of colors, sizes; aesthetic; efficient; cool; inexpensive Not ideallysuited forphoto-synthetic plants or invertebrates Mini or micro reef with lowlight corals and plants;fish only;use actinic for dawn to dusk with metal halides
T5 HO=hi output florescents 24-54w last 16-24 months 6,000°-11,000°K; actinic Longevity, high intensity, small size, cool running Not ideally suited for aquariums more than 24" deep Reef less than 24" deep; freshwater planted; use actinic for dawn-dusk with metal halides
VHO=very high ourput 75-165w last 4-18months* 10,000°K; actinic Large selection of sizes;longer bulb life than standard fluorescent Higher heat - may require a chiller Reefs less than 24" deep; use
actinic fordawn-dusk with metalhalides
PC=power compact 9-96w 14-24 months 5,000°-10,000°K; actinic Longevity;high intensity; wide spectrum
range;compact May producehigher heat -may requirea chiller Reef lessthan 24" deep;
freshwater planted;use actinicfor dawn-dusk with metal
MH= metal halide 175-1000w last 6 to 18 months 4,000°-20,000K° Highestintensity;wide spectrum
range Higher heat - may requirea chiller; possible UV radiation Reefs or freshwater
more than
24" deep;
photosynthetic
corals and
invertebrates
I hope this lighting chart helps as you can see No other lights come even close to MH in lighting output.also please notice all other lighting choices also state with use in conjunction with MH lighting for coral reefs not as a replacement for them