Lux (lx) لكس
The amount of light reaching a surface, i.e. lumens per square metre. Lighting is designed on this basis.
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Related terms
- Lumen (lm) لومن
- The total amount of light a fitting emits in all directions. The basis for comparing two fittings.
- Watt (W) واط
- The electrical power a fitting consumes, not the amount of light it gives.
- Efficacy (lm/W) الكفاءة الضوئية
- The number of lumens produced per watt. The higher it is, the more efficient the fitting.