Product Overview * TG Series tube guards slip over the fluorescent lamp and are secured by means of two heat resistant end caps. * Convex tube guards capture all shattered glass and phosphorus in the guard should the lamp be broken. * Available in various lengths, diameters and colours. * Convex U.V. tube guards not only absorb all ultraviolet (U.V.) radiation 400 nanometers and below, but part of the harmful visible light in the violet 400 - 450 nanometer region.