In the architect's notes on the plan I read:
"Internal Lighting. All new light fittings should be energy efficient. These lights shall only take lamps with a luminous efficiency greater than 40 lumens per circuit watt."
"External lighting - If external lights are to be installed then these lights must be automatically extinguished when there is enough daylight and be fitted with sockets that can only be used with lamps having a luminous efficiency of greater than 45 lumens/circuit watt, in accordance with the Domestic Building Services Compliance Guide 2010,"
Firstly this sounds like yet another set of light fittings which have no commonality with any other light fittings in the house. Secondly, if I can still buy standard large and small bayonet and large and small Edison screw light fittings in the sheds, what is going on here?
Looking at the guide, I suspect that for inside I have to fit for example CFLs in standard light fittings to get Building Regs sign off but then can take them all out if I want. Which I may have to do if I want dimmable lighting in standard fittings without having to spend a fortune on dimmable CFLs.
Is this a sort of reverse wording which really means "no tungsten filament or tungsten halogen downlighters and if anything we haven't thought of turns up then that is banned as well"?
For the external lighting thing, it looks as though Christmas lights and similar are O.K. as long as they are below 100 watts per fitting.
And me with a shed full of various light fittings which now look to be out of date.
Which will obviously not now be used (especially before Building Regs sign off).
Sigh
Dave R