The NA Lamp MH-150W is a metal halide lamp, HQI with a ‘cool’ color temperature (8000K°). Furthermore its lighting spectrum has a high green color value, which is typical of all ADA lamps.
Depending on the type of layout or particular aquascape of your aquarium (i.e. plant species used), and also your particular maintenance regimen, it is advisible to limit the total photoperiod (lights-on period) of HQI halogen bulbs.
Due to their brightness, intensity, and exceptional penetration, a period between 6-8 hours maximum is suggested.
Many HQI light fixtures also incorporate power compact fluorescents, and a common practice is to run the power compact fluorescents for a full 10 hours (the average suggested total photoperiod) and have HQI halogens run for only the 6-8 hour recommnded period.
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