Big Ten 10'' Grow1 ReflectorTo increase the efficiency of a growlight, you need a grow reflector that can be paired to it for increasing the light reflectivity. The Big Ten grow reflector lets you adjust the socket position, so the light emitted by the bulb reaches a wide number of plants and a vast area. The flip down glass, which comes with the reflector, is super easy to use, and the rubber seal, which comes along with the steel clamps, constitutes an air tight, secure close.