Current USA PowerPaq HQI metal halide double end bulb features 20,000K and 150-watt. PowerPaq lamp represent a new level in illumination, emitting the high intensity and crisp color rendition your corals crave. These lamp is manufactured with precision, which deliver consistent halide temperatures and higher maintained light output over the life of the lamp. Lamp is put through vigorous testing and quality control which includes a burn-in process to stretch the filament and ensure proper wavelength emission. PowerPaq lamp deliver a whole new world of brightness and illumination. Engineers have created the ultimate rapid start halides with a special igniter and higher gas fill pressure. The result is full brightness and quick re-strike in 50 percent less time. This combination also produces more lumens per watt and longer lamp life. When coupled with Current"s proprietary electronic driving system, PowerPaq lamps produce the highest lumen per watt of any comparable HID lamp. High lumen output means not only significant energy savings, it means your corals will grow faster and stay healthier.