Colour Temperature: 5500K Lumen - LED Life-Span: Approximately 50,000 Hours Power Supply: In-Built Rechargeable Battery 3.7v (USB Charging Lead Included) Battery Life: 7 - 48 Hours - Charging Time: 3-4 Hours Product Size: L85 x W40 x H380mm Touch Sensitive Control Button On The Base For Power Control And Brightness Level Adjustment.