G-Lux series are Luxul Technology's LED T8 Tubes for electronic ballast with full Glass housing. G-Lux series lamps are UL Listed, have a lifespan of 50,000 hours, use less than 50% of energy compared to standard fluorescent lights, and come with a standard 5 year warranty. G-Lux lamps are currently available for 4ft T8 lamps replacement.