Okla. Stat. tit. 52, § 52-294: Lights - Daytime use prohibited

The person, firm, company or corporation consuming said gas, and

using burners in open air or in or around derricks, shall turn off

said gas not later than eight o'clock in the morning of each day

such lights or burners are used, and shall not turn on or relight

the same between the hours of eight o'clock a.m. and five o'clock

p.m.