Take your copy work to a higher level with this cold light RB 5055 HF Lighting Unit from Kaiser with four 55W fluorescent lamps, in two separate light banks. The inside of the reflectors are high-gloss for greater efficiency. The all-electronic high frequency operating system functions at approximately 40 kHz for immediate ignition and flicker-free operation. Each light can be tilted and shifted independently. The horizontal lamp arms are continuously height adjustable, and the tilting vertical arms have height markings with detents. The lights mount with sturdy die-cast clamp bases, and have a 1.9" width. The lamps are controlled with a separate control box.