HPS - High Pressure Sodium Lamps
HPS - High Pressure Sodium grow lamps have been used for more than 50 years in indoor growing situations from greenhouses to grow tents around the world. HPS lamps are referred to as HID or High intensity discharge lamps and are mainly used in the flowering stages being high in the Red colour spectrum. They are also suitable for vegetative growth phases. Some indoor gardeners prefer Metal Halide Lamps with high levels of the Blue colour spectrum for vegetative growing stages.
