Compact and portable, the Sony 20DW DC on camera video light can emit 10 or 20 watts of slightly diffused video or photo light. Color temperature is approximately 3000 degrees K. and the bulb life is approximately 100 hours. The 20DW light uses Sony or equal type lithium ion batteries. Please note that using certain types of the "NP" batteries allows the light to emit 10 or 20 watts. For maximum usage, use NP F900 series batteries, IE: 930, 9 50 , or 970 rated.