The 6” Ultra Cool XL Reflector has a pebble-finish interior for a 95% rate of reflection. The included tempered glass safety lens and built-in six-inch flanges make it ideal for inline ventilation and gardens with carbon dioxide enrichment. The foam-lined lens is easily secured to the reflector, and unique metal brackets help form an air-tight seal to make this one of the best sealed reflectors around. The lamp holder mount can be raised and lowered inside the Ultra Cool XL to create the desired light spread, and an additional deflector accessory (included) enhances reflector performance by preventing light from escaping through the flange at the opposite end.