PowerPlant Super 250 watt HPS Bulb PowerPlant lamps are tailored to promote optimum development at each stage of plant growth. The PowerPlant arc tube dosing technology achieves more usable light energy without sacrificing intensity or lamp life. Efficiency - PowerPlant lamps provide more lumens per watt than other standard lamps PowerPlant provides the full spectrum of light that plants need, provides richer, more nutritious light. A large number of organisations already use PowerPlant lamps including large scale nurseries, agricultural facilities, research institutions and rare species and tropical plant growers.