HPS, or high-pressure sodium, bulbs are one of the most popular HID (high-intensity discharge) lamps in use today. Heavier in the orange-to-red wavelengths, HPS bulbs provide excellent spectrum for ...

Manufacturers originally designed double-ended high-pressure sodium light bulbs so they would be compatible with double-ended metal halide fixtures. Traditional single-ended high-pressure sodium bulbs ...

Indoor growing offers many advantages. The biggest benefits are the most obvious: garden pests can’t get at your plants, and you have total control over the weather. Yet unless you’re lucky enough to ...

Exposure to the light of 'white' LED bulbs appears to suppress melatonin five times more than exposure to the light of high pressure sodium bulbs that give off an orange-yellow light, according to new ...