Murphy All-rounder LED light bulbs give you the convenience of three light sources (with different brightness) in one. They can be easily switched between 15W, 8W and 0.5W light mode by just switching them OFF and ON again, for example if the bulb is ON in 15-Watt mode switch it OFF and ON again to adapt to 8-Watt, repeat the same to switch to 05-Watt. They have no flickering, no warm up time and noise during operation.