Fluorescent lamp T5 16x517mm Fluorescent lamp T5, G5, 54 daylight. The T5 lamps have a higher light output than the previous T8 products. Energy efficiency class: A Weighted consumption (kWh/1000h): 15 Mercury content (mg): 2.5 Switching cycles: 30000 Ignition time/start time (s): 0.3 Color rendering index (Ra): 75 Luminous flux maintenance: 65.00 Lifespan (h): 8000