An artificial lighting apparatus for young plants that includes at least one electric track and a plurality of lamps. The lamps are detachably mounted on the electric track. Each of the lamps includes a plurality of first light emitting diodes, a plurality of second light emitting diodes and a mounting...http://www.google.com.au/patents/US6474838?utm_source=gb-gplus-sharePatent US6474838 - Artificial lighting apparatus for young plants using light emitting diodes as light source
