TH Newest Full SpectrumPlant lamp contains 80 PCS LEDs (52 red pieces and 28 blue pieces). The spectrum of 630-660nm and 400-470nm is the most effective spectrum to support photosynthesis of plants in seedlings. Growth light promotes photosynthesis, germination, flowering and fruit formation. The 4 heads grow light has a flexible 360 degree swivel gooseneck, offers a much greater range than the shorter LED lights on the market, and meets the requirements of plants multi-layered. With the non-slip gripper, they are sturdy enough to maintain their position and perfectly cover the plants. Auto Turn On/Off ;Timing Function Our 40w plant heat lamp is help to plant growth with an automatic timing function and a USB plug (comes with AC adapter).4/8/12 hours timer setting options according to plant needs, set up once and it will turn on/off automatically every day. Such as, if you press the button (4H), grow lights will keep working for 4 hours and then turn off automatically every day. Colour: Black Size: Wire 14.8 inches, Tube 10.5*0.79 inches Delivery Quantity: 1 Piece