High lightness LED, long life span. Extremely energy saving. Working under safety voltage. Shading degree is adjustable. 2 Mode: Only blue light on, or all white & blue light on. It can be used for water plant and daily lighting. Soft arm can be adjusted by any angles and positions. 40pcs white light LED, 8pcs blue light LED. Recommended aquarium tank size: 30-50cm. Normal operating temperature 20 to 50 Centigrade.