Texas Natural Resources Code - NAT RES § 91.017. Using Gas in the Open Air

(a) Any person who uses gas in lights in the open air or in or around derricks shall turn off the gas not later than 8 a. m. of each day the lights are burning or are used and shall not turn the lights on or relight them between 8 a. m. and 5 p. m.

(b) The person consuming the gas and using the burners in the open air shall enclose them in glass globes or lamps.