... in 0.01sec, no flashing,no noise,no rediation. Energy saving, belongs to grand environmental lights;5.Ultra-thin design,light ... steady performance and long lifespan.Series 4 LED SMD CEILING LAMP SERIES-18W Description Item no:ColorLED QtyView AngelLight FluxInput ... 5.Residential, institution,school,colleges,universities;6.Place where energy saving and high color rendering index lighings required.