5.1. In the exhibition galleries a stable climate with the following conditions must be maintained 24 hours a day:

• Temperature: 18-24 °C
• Relative humidity: 40-50% and should not vary more than 5% within an hour
• Light intensity        paintings: approximately 150-200 lux
                               drawings: works on paper shall be lit by artificial lighting only, andthe light intensity measured on the object must notexceed 50 lux

https://kimittud.atlatszo.hu/request/2605/response/4291/atta... - page 6