Fluorescent Ring Light features tri-band phosphor bulb and easy lamp replacement. Staying cool to the touch, the polycarbonate plastic housing does not radiate heat that can affect samples. Ring configuration allows 360°diffuse illumination with strong intensity even at long distances. This Fluorescent Ring Light is useful in inspection and assembly environments. It is also especially well suited for video and machine vision applications, providing high frequency, flicker-free output. Variable intensity option allows for 10%-100% adjustment