FeatureHigh Quality Ultra Bright LED BulbsUp to 90% Energy Saving, 50000 Hours LifetimeUltra low power consumptionCheap to run (save electricity)Does not contain lead, mercury and other pollution elements.Great reducing carbon emission, environmentally friendly.Solid state, shockproof.Spotlight, no VU and IR radiation.Suitable for halls, bars, office or home use.Learning TipsLumen depreciation is that after sometimes working, the luminous of the LED bulb will decrease when compare with the initial luminousThere are two major reason for the lumen depreciation:1, The using LED chip in products are in bad quality so that brightness decay faster2, The current of driver is higher than its rated condition