A method of growing grass or turf of varying types includes determining lighting needs of a sward, measuring or otherwise determining an existing DLI and spectrum of light delivered to the sward, and delivering supplemental lighting to at least a portion of the sward dependent, at least in part, on determining the lighting needs of the sward and measuring or otherwise determining the existing DLI and spectrum of light delivered to the sward.

A method of growing grass or turf of varying types includes determining lighting needs of a sward, measuring or otherwise determining an existing DLI and spectrum of light delivered to the sward, and delivering supplemental lighting to at least a portion of the sward dependent, at least in part, on determining the lighting needs of the sward and measuring or otherwise determining the existing DLI and spectrum of light delivered to the sward.