2GX13 T5 fluorescent ring lamp in various designs - from Sylvania This fluorescent ring lamp is both energy-efficient and durable. With its round shape, it fits perfectly into flat, round and square luminaires. Features: - the burning time is a good 16,000 hours - has a very good luminous efficiency - very energy-efficient (EEC A) - is operated on electronic ballasts - is available in various versions: 22 W, warm white (3.000 K), 1,800 lm 22 W, universal white (4,000 K), 1,800 lm 40 W, warm white (3,000 K), 3,300 lm 40 W, universal white (4,000 K), 3,300 lm 55 W, warm white (3,000 K), 4,200 lm 55 W, universal white (4,000 K), 4,200 lm