Generally, the illuminance of the stairwell is not less than 70% of the illuminance of the adjacent space. The stair light can make safer when walking one the stair, and the stair light is a very good decoration, making the space more elegant.
Chandeliers are often used for lighting in stairwells. The stair chandeliers are characterized by large length and heavy weight. The main point in designing lamps is to pay attention to the problem of pendant winding and load bearing.