Philips – 250W, 400W, 600w & 1000WHPS Master Son-T PIA Green Power – Light Bulb
Greenpower lamps are ideal for flowering light. They encourage CO2 assimilation for greater photosynthesis and growth of plants. Master Son-T pia Greenpower lamps have the highest amount of growth light per Watt (PAR). It is the most efficient SON lamp with the best light-technical performance resulting in the lowest use.