Olivier Hainaut

“If you have a 10 percent increase in light pollution, you have to increase all the exposure times by 10 percent.”

“For a 100 percent increase in light pollution, you have to increase all the exposures by 100 percent.”

“This is not a hard number, like 99 999 is good and 100 001 is bad: clearly I’d prefer 50 000,”

“100 000 causes losses at about the level of other technical losses, such as equipment failure.”