Light Fixture with Retractable Blocking Device for an Expanding Lens

A light fixture, comprising:

• a housing, the housing comprising a top panel, a pair of side panels, and a pair of end panels, wherein the top panel is attached to a top of each of the side panels and each of the two end panels to form the housing;
• an LED-based light source located inside the housing;
• a lens configured to mount to the housing, the lens having a length shorter than a longitudinal length of the housing, thereby creating a gap between the lens and at least one end panel of the housing;
• and
• a first plate attached to a first end panel, wherein the first plate includes a flat portion that attaches to the first end panel and an angled portion that extends from the flat portion of the first plate at an angle defined as between approximately 10 degrees and approximately 60 degrees, wherein the angled portion of the first plate covers the gap between the lens and the housing, wherein the angled portion of the first plate retracts against the lens as the lens expands due to heat from the light source.