1. A system for applying light to an environment, the system comprising:an elongate first body comprising a first side wall, a second side wall opposite the first side wall, and a bottom wall, the first body defining a lengthwise channel between the first side wall and the second side wall;
a first groove disposed along an inner surface of the first side wall;
a second groove disposed along an inner surface of the second side wall;
a cover, the cover being coupled to the first body via the first groove and the second groove, wherein the first body and the cover collectively enclose at least a portion of the channel;
a light emitting diode (LED) disposed within the channel;
a window comprising a material that is at least partially transparent to one or more wavelengths of light emitted by the LED, the window being disposed in the cover adjacent the LED such that light emitted by the LED may pass through the window;
wherein an outer surface of the first sidewall comprises a male connector, and an outer surface of the second sidewall comprises a female connector, the male and/or female connectors being adapted to couple the first body to a second body having at least one connector that is complementary to the male or female connector.