Abstract: Devices for impinging light on tissue to induce one or more biological effects and more particularly phototherapeutic illumination devices and light guide assemblies with emission-directing structures are disclosed. Emission-directing structures include arrangements of light guides and light guide positioners that may be provided with titled arrangements for directing light emissions toward target tissue. An exemplary light guide may define an optical axis therethrough, and an exemplary light guide positioner may include one or more features that are tilted with respect to the optical axis. Certain tilted features may relate to offset incisor tabs and/or angled biting surfaces that engage within the oral cavity for repeatedly orienting the optical axis in a target direction.

Abstract: Lighting fixtures that include fixture housings and light-emitting diode (LED) modules configured for tool-less attachment and detachment to the fixture housings are disclosed. Certain LED modules include LED emitters, corresponding electronics for operating the LED emitters, and at least one shaped protrusion. Certain LED modules include safety tethers that are configured to provide mechanical support during the tool-less attachment and detachment. Lighting fixtures include a lens and removable endcaps that secure the lens to the fixture housing. Certain lighting fixtures include a backup battery and a button provided in one of the endcaps for testing the backup battery. Certain lighting fixtures include a cut-out portion in the fixture housing corresponding to the shaped protrusion of the LED module for providing identification of replacement LED modules that may be attached to fixture housings.

Abstract: Lighting fixtures that include fixture housings and light-emitting diode (LED) modules configured for tool-less attachment and detachment to the fixture housings are disclosed. Certain LED modules include LED emitters, corresponding electronics for operating the LED emitters, and at least one shaped protrusion. Certain LED modules include safety tethers that are configured to provide mechanical support during the tool-less attachment and detachment. Lighting fixtures include a lens and removable endcaps that secure the lens to the fixture housing. Certain lighting fixtures include a backup battery and a button provided in one of the endcaps for testing the backup battery. Certain lighting fixtures include a cut-out portion in the fixture housing corresponding to the shaped protrusion of the LED module for providing identification of replacement LED modules that may be attached to fixture housings.