Inadequate lighting in elevator car
Interior bulb burned out
- Causes
Overheating of light bulbs, poor installation workmanship
- Description of defect
Burned out bulb signifying inadequate ventilation for the light fixtures. The problem shows that the bulb experienced overheating, especially when it is enclosed or recessed. Hence, the ventilation ports inside the casing need to be inspected, ensuring the ports are not clogged by dust or debris.
Elevator car lighting bulb burned out
- Good practices
A lift car shall be provided with a minimum of two light fittings. The car shall be illuminated with at least 50 lux at floor level and on control devices (SS550).
EN81-20:2014 required the car interior shall provide an illumination intensity of 100 lux, and emergency in-car lighting of 5 lux for one hour.
- Corrections
Use of LED lighting will provide a long service life and reduce the frequency of lighting replacement. Besides, it also far energy saving as compared to a conventional incandescent and fluorescent bulb.
Application of LED lighting fittings in an elevator car [24]
Bulbs Flickering
- Causes
- Poor installation workmanship
- Description of defect
The light bulb that are screwed in too tightly into the light fixtures, causing the flexible brass tab located in the light fixtures to flattened. Typically, the tab should be slightly raised, a quarter inch from the bottom of the socket.
The bulb will be not properly connected to the tab, thus causing an electrical arc that can severely decrease the light bulb’s lifespan.