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Protopia Super High Pressure Sodium (HPS) lamps are the classic and most popular choice for flowering rooms. Protopia HPS lamps can be used through the vegetative and flowering stages, but the yellow spectral output makes them optimal for flowering. Performance Data Lamp Wattage (W): 1000 Light output ( Lumens @ 100hours): 146000 Lumens per Watt (lm/W): 146 Rated life (Hours @ 10 hour/ start): 24000 Correlated Color Temperature (K): 2000 Color Rendering Index (CRI) or (Ra): 25 Photon flux (μmol/s): 1850 Burning Position: HOR±15°