Patent attributes
A heating, ventilating and air conditioning (HVAC) system, comprising a heat exchanger plenum having a surface located therein that is susceptible to degradation upon exposure to light, and a light bulb located within the plenum. In one embodiment, the light bulb has a side directed toward the surface and a light-absorptive barrier coupled to the side. The light-absorptive barrier is configured to reduce direct light transmission from the light bulb to the surface to thereby inhibit degradation of the surface. The invention further provides an HVAC system comprising a light bulb configured to emit photonic energy, and an absorptive barrier coupled to at least a portion of an outside of the bulb. The absorptive barrier is configured to substantially reduce transmission of the emitted photonic energy beyond the portion of the bulb.
