Theta merges its elegant modern profile with a retro, vintage feel. Battery-operated and rechargeable portable table lamp. The lamp has a multi-function control knob on top of the metal shade that can be used for dimming and for continuous tunable color temperature from 2200K (candle light) to 3000K (cool white). The integrated LED module and the optical polycarbonate diffuser mounted in the metal shade produce controlled down light. LED light source is dimmable and offers tunable color temperatures from 2200 - 3000K. Die-cast aluminum structure with a prismatic plastic diffuser. Offered in 3 outdoor suitable powder-coated finishes and three electroplated metallic finishes (indoor only). Approximate battery life is 9 hours (at full power) Charging time on the contact charging base 6 hours. Includes contact charging base with cord (charging plug not included). IP65 Knob on top of the lampshade acts as a dimmer and controls the color temperature.