How many lights needed for a room?

FAQ

How many lights needed for a room?

How much light is required, account must be taken of the type of visual task, When you are going to make a lighting planing for your room.

To be able to safely find the emergency exit in a building, 1 lx is sufficient

To be able to distinguish facial expressions, approx. 20 lx is required

For accent lighting in shop windows, 1500 – 2000 lx is usual

Operation tables must be illuminated with a minimum of 5000 lx

In rooms where people work, legal minima apply for the illuminance, depending on the room and on the visual task.

Examples from European standard EN12464, Lighting of Indoor Work Places:

50 lx stable

75 lx parking area

100 lx storage space

200 lx canteen

300 lx classroom

500 lx professional kitchen

750 lx fine assembly work

2000 lx engraving installation

5000 lx operation table

These minima relate to the average illuminance in the working area. The uniformity in the working area may not be less than 0.7, and not less than 0.5 In the immediate surroundings.

The initial illuminance values must be higher than the legal minima, because account must be taken of light degradation caused by contamination and ageing of lamps and fixtures.

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