Patent ID: 7547112

Claim:
A low-clearance light emitting diode lighting, comprising: at least one light tile, including: a light guide panel; a plurality of light emitting diodes positioned on at least two side surfaces of the light guide panel; a reflecting plate at a back surface of the light guide panel; reflectors positioned on the light tile and having reflecting surfaces at two opposing sides of each of the plurality of light emitting diodes; and a metal frame having an upper frame member and a lower frame member supporting the at least one light tile on a ceiling-grid of a drop-ceiling and removing heat from the plurality of light emitting diodes wherein the at least one light tile is sandwiched between the lower metal frame and the upper metal frame, and, wherein the metal frame lower has a stepped section with first, second and third contiguous portions in which the first portion contacts the ceiling-grid, the second portion protrudes below the ceiling-grid, and the third portion contacts the light tile and is positioned below the ceiling grid such that a portion of the ceiling-grid is above the low-clearance light emitting diode lighting.