The Alzo 750 is a Continuous Light Head with Bulbs. These lights are the heart of Alzo 750 Continuous Portrait Studio Kits. The unique Variable Intensity control is used to manage "Key" to "Fill" light ratios, facilitating professional portrait results. Continuous lighting is recommended for digital photography because it is very easy to use with any digital camera and produces excellent results. The "custom white balance" function of digital cameras corrects for the 3200K color temperature of these Tungsten incandescent lamps and reproduces very accurate color.