Distance from spotlights
Spotlights are available with one or multiple bulbs. Single-bulb ceiling spotlights are often distributed evenly throughout the entire room.
The distance between the individual lights depends largely on two factors: one of course being how bright you'd like the room lit. The other depends on the illuminance level of the lights.
An illuminance of 500 lux is recommended for offices, which corresponds to 500 lumens per square metre. If the spotlight has a luminous flux of 250 lumens you'll need two lights per square metre. If the light only has 100 lumens, you'll need five lights per square metre.
100 lux is sufficient for basic kitchen or office lighting, 50 lux is adequate for corridors and living rooms need aroud 200 lux. Using these values, you can determine how large the distance between the individual spotlights should be.
We recommended keeping the distance between the lights as even as possible to achieve balanced lighting. You can make exceptions for dark corners and alcoves. You may need an extra lamp here.