Abstract: A spine for a troffer light fixture is provided. The spine is configured to receive omni-directional LED bulbs. The spine comprises: a base, a first wall, a second wall, and first end walls defining a light chamber shaped as a trough. Interior angles between the first wall, second wall, and base is 90-100 degrees respectively. The second wall defines a plurality of apertures each having a central axis arranged generally parallel in a linear arrangement. The apertures include: a pair of flanking apertures, the axis of each flanking aperture positioned 80-110 mm from one of the first end walls, and at least one interior aperture, the axis of each interior aperture positioned 135-145 mm from the axis of an adjacent aperture. Each of the plurality of apertures provides an opening through which an omni-directional LED bulb can extend parallel to the base to engage a socket mounted on the spine.

Abstract: A method of retrofitting a plurality of LED bulbs to a fluorescent tube fixture with a ballast, a fluorescent tube receptacle, a reflector housing and a lens comprises: removing the lens from the reflector housing; disconnecting the ballast from a mains power supply line and removing the ballast and the fluorescent tube receptacle from the housing. The mains mains power supply is wired to a plurality of Edison socket light-emitting diode (LED) bulb sockets extending from a body defining an electrical junction box and threading a plurality of LED bulbs into the bulb sockets. The electrical junction box is mounted to the reflector housing. The fixture lens is reinstalled to the housing such that the bulb adapter is received in an enclosure defined by the housing and the lens.

Abstract: A method of retrofitting a plurality of LED bulbs to a fluorescent tube fixture with a ballast, a fluorescent tube receptacle, a reflector housing and a lens comprises: removing the lens from the reflector housing; disconnecting the ballast from a mains power supply line and removing the ballast and the fluorescent tube receptacle from the housing. The mains mains power supply is wired to a plurality of Edison socket light-emitting diode (LED) bulb sockets extending from a body defining an electrical junction box and threading a plurality of LED bulbs into the bulb sockets. The electrical junction box is mounted to the reflector housing. The fixture lens is reinstalled to the housing such that the bulb adapter is received in an enclosure defined by the housing and the lens.