Mike Tomlinson wrote:
In article ,
writes

How much light should one need in a 2.5 metre by 1.5 metre bathroom
with virtually no outside light (it just has a narrow window onto a
stairwell)? I guess the choices are 6 x 20 watt, 6 x 35 watt or 6 x
50 watt.

6?! Better budget on a pair of sunglasses then. We put 3 x 20w in our
2m x 2m bathroom and that is perfectly adequate.

OK, thanks, maybe 6 x 20 watts is the way to go then. Certainly my
mother-in-law's bathroom which is a similar size is very adequate with
six downlighters.


By the way, as the lights are low voltage, fed using a proper (not
electronic) transformer, and the bulbs are sealed, I didn't worry about
IP4x ratings and stuck in "normal" eyeball fittings, including the one
above the shower. We originally wanted (mains) wall lights but I
couldn't find any IP rated ones in a design that I actually liked.

I have wondered about this and whether IPx4 rating is required when
they are low voltage. I couldn't find any explicit information and,
as the flat *might* be let again one day I need to keep to the letter
of the (non-)law.

The other thing I'm finding difficult is that most downlighters seem
to need a minimum of at least 4" void above them with many needing 6".
Are there any that need less space behind them?

--
Chris Green )