Patent ID: 7021548

Claim:
A photosensor cover for detecting a malfunction in a lighting system, wherein the lighting system comprises: an illuminator; and a photosensor comprising: a photocell that detects a threshold amount of light; electronic circuitry in communication with the photocell that signals the illuminator to turn on/off when the threshold amount of light has been detected by the photocell; and a housing body that holds the photocell and the electronic circuitry; wherein the photosensor cover comprises: a cap comprising: a barrier layer comprising an opening that leads into a cavity, wherein the barrier layer guards the photocell from the threshold amount of light, and wherein the barrier layer further comprises a bottom side opposite to a top side and side walls that connect the bottom side to the top side, wherein the bottom side comprises a rim that surrounds the opening that leads into the cavity, wherein the rim comprises an internal channel; and an adjustment element, wherein the adjustment element allows for the expansion or contraction of the opening, and wherein the adjustment element assists the barrier layer in guarding the photocell from exposure to the threshold amount of light.