Patent ID: 8360599

Claim:
An LED-based light for replacing a conventional fluorescent tube comprising: an elongated highly thermally conductive heat sink having a radially outer portion; an elongated high-dielectric lens engaging the heat sink and forming a first portion of a housing for the LED-based light; a high-dielectric cover engaging the heat sink and overlaying substantially all of the radially outer portion of the heat sink to form a second portion of the housing for the LED-based light separate from the first portion such that the cover isolates the radially outer portion of the heat sink from an ambient environment surrounding the LED-based light; a plurality of LEDs; a circuit board structure extending substantially the length of the heat sink, the circuit board defining a LED-mounting side of the circuit board and a primary heat transferring side of the circuit board opposite the LED-mounting side, the LEDs mounted on the LED-mounting side at predetermined intervals along the length of the circuit board for uniformly emitting light through an arc of the lens, the circuit board mounted directly to the heat sink on a surface opposing the radially outer portion of the heat sink with the primary heat transferring side of the circuit board in thermally conductive relation with the heat sink and substantially all of the radially outer portion of the heat sink in thermally conductive relation with the high-dielectric cover for highly electrically insulated thermal transmission of heat generated by the LEDs from the circuit board to the ambient environment surrounding the LED-based light; and a pair of end caps disposed on the opposite ends of the housing, at least one end cap carrying at least one connector configured to electrically connect the LEDs to an existing fixture.