LEDs are the most efficient form of artificial lighting.
In BASIX, lighting must be primarily lit (minimum 80% of light fittings) by compact fluorescent, fluorescent, or LED lamps.
There is no requirement to enter light fittings by room, as BASIX assumes an average of 4 W/m2 (watts per square metre) for artificial lighting. Using LED lights, it’s easy to keep energy use for lighting very low—less than 1 W/m2—in most rooms.
What is a dedicated light fitting?
Dedicated light fittings are only capable of accepting fluorescent or LED lamps. This improves the energy efficiency of the home by ensuring an efficient fixture is used for the life of the building.
Last updated: 25/02/2026