Question about Energy Effiecent lighitng

[Lucas]

Just a quick one, does anyone know what percentage of lighting in a new build has to be energy efficent? We did a job last year that was 25% but now the builder is saying it has raised to 75%. Shame they don't recognise 4W LED's over 11W energy efficent's! Seem's to me like a bit of a grey area and would much appreciate if someone could clear it up for me

 

[IQ Electrical]

Just a quick one, does anyone know what percentage of lighting in a new build has to be energy efficent? We did a job last year that was 25% but now the builder is saying it has raised to 75%. Shame they don't recognise 4W LED's over 11W energy efficent's! Seem's to me like a bit of a grey area and would much appreciate if someone could clear it up for me

You need Approved Document L1A and L1B they define 'energy efficient' by lumens per circuit watt per luminaire.

My information on provision of luminaires says that you must:

Provide light fittings (including the lamp, control gear, housing, reflector, shade or diffuser)
that can only take lamps having a luminous efficacy greater than 40 lumens per circuit-watt.
Provide fixed energy efficient light fittings (as above) that number no fewer than the greater of:
a. one per 25 m2 of dwelling floor area (excluding garages), or
b. one per four fixed lighting fittings.

I will check tomorrow if this is still the current guidance.