Features: The physiological wavelength is appropriate for human body accept, soft light, vibration resistance, low starting current, power save, longer working life. Carbon fiber heater lamp( M) Power( w) Volt( v) Life( h) OD( mm) 500 100-240 5000 10-15 800 100-240 5000 10-15 1000 100-240 5000 10-15 1500 100-240 5000 10-15