... -12w comptatible ballast led corn light equivalent 50-400W General Incandescent,50-400W General Energy-saving lamps. 2 Long life: light ... filament, no glass bulbs, not afraid of vibration, less breakable, life of up to 50,000 hours (incandescent life of only 1000 ... : fever small, 90% of the electrical energy into visible light (incandescent electric energy conversion 80% for the heat,only 20% of ...