The High Yield Lighting FloraLux complete 150-watt HPS system, the original stealth grow light, is recommended for small plants/indoor gardens. Can also be used as supplemental lighting or for wintering plants indoors — Low wattage, high output, air cooling capable — Louvered vents for heat dissipation. Fixture features tempered glass lens, and can be fitted with a 4" flange (sold separately) and connected to fans for forced air cooling. Included enhanced horticultural spectrum 150-watt HPS bulb can be used for all growth phases, and provides the best light spectrum for flowering growth. 'Plug and play' - no external ballasts needed - includes hanging hardware for quick setup, and 10' power cord plugs into a standard household grounded outlet. All products ship in plain, discreet packaging.