Section 7(o) in The Prevention Of Cruelty To Animals (Slaughter House) Rules, 2001
(o)Every abattoir shall be provided with distributed artificial light of an overall intensity of not less than 200 lux at the distances as may be specified by the Central Government throughout the slaughter hall and workrooms and at places where meat inspection is carried out, the overall intensity of artificial light shall be not less than 500 lux;
