Abstract: According to one or more aspects of the present invention, a unit is disclosed that provides artificial light to promote plant growth. The unit utilizes red and blue light emitting diodes (LEDs) to emit wavelengths of light that are more favorable to plant growth. In particular, blue LEDs are interspersed with red LED's to broadcast a desired range of light. Although the LEDs operate at lower temperatures than conventional artificial light sources and thus allow the unit to be placed closer to plants for more efficient growth, the unit includes a heat sink to disperse even more heat. Separate switches are included to control the red and blue LEDs to allow controlled exposure to different light sources to facilitate desired plant growth.