As the most experienced brand in HPS DE since 2005, Philips understands professional horticulture needs. The new Philips 1000 Watt HPS AGRO Plus DE EL lamp is their best, highest output lamp ever produced. This 400 V high frequency lamp is made in Belgium. It is nitrogen filled with a quartz glass outer jacket for perfect optical quality. This lamp produces 2,120 μmol/s at 1,000 watts and an amazing 2,400 μmol/s when boosted to 1,150 watts.