The present invention relates, in general, to an water cooled horticultural growing light and a method of using the same. More particularly, the present invention relates to a water cooled horticultural growing light and method wherein water flows through outer glass tubes to cool the light source which sits inside an inner chamber of the invention. This invention allows for the light source to be placed in close proximity to the plants. This invention can be used in nurseries and other growing facilities to increase productivity by allowing plants to receive increased solar rays without the damaging effects of heat.