A replacement 4ft 54W HO T5 lamp, operating in the 10,000K spectrum.
The 10,000 Kelvin lamp is often used to grow plants during the vegetative cycle or as a supplemental lighting source for HID lighting systems, especially HPS lamps. The ULTRA-BLUE Spectrum of the10K bulb supplements Orange/Red spectrum of HPS lamp and can be used alone for incredibly green, lush plant growth.
The light spectrum of 10,000K is also used as a "Finisher" for essential oil production.
* The same bulbs as Coralife Aquatic 54-Watt 10000K T5 HO Lamp Aquarium Light, 48-Inch.