Using T5 lamps is a cost-effective lighting systems solution for a variety of reasons. Unfortunately the average T5 lamp will dissipate about 73% of its total lamp power as heat. And when this lamp is used in combination with a tube guard, that heat must be properly dissipated from the lamp. Engineered Product Company's (EPCO) T5 HD (Heat Dissipation) Series Tube Guards takes into consideration two major factors; the temperature on the inside of the tube guard, and how close the T5 lamp is actually located to the tube guard. EPCO always recommends using "Heat Sink" when installing T5 HD Series Tube Guards to help distribute excessive heat on both ends of the fluorescent lamp. High volume installers can now reduce their installation time by using our T5 HD Series Tube Guard with "pre-installed" Heat Sink to save time and money while providing a convenient and economical solution to expedite the installation process.