LED reflector lamp R50 49.8x84mm replacement for halogen spotlights, use at 110-240 VAC and 80-230 V DC, not suitable for 24 hour operation, maximum lighting time is 10-12 hours/day. A longer lighting time can lead to a shortening of the life expectancy Mercury content (mg): 0 Ignition time/start time (s): 0.0 Luminous flux maintenance: 0.70 Power factor: 0.44