You can purchase them! There is a company selling water-cooled LED grow lights, which reduce the heat dumped in the growing space. This means a longer lifespan for your grow lights while reducing the costs needed for AC infrastructure.

Water-cooled LED Grow Lights | Oreon

Link: https://www.oreon-led.com/en/wat

Grow the same quality year-round with water-cooled LED grow lights. Water cooling ensures that the grower gets control over the cultivation. Read more!