On Tue, 09 May 2006 20:59:03 +0100, Owain
wrote:

T i m wrote:
Anyone aware of a an 'emergency' light that (ideally that functions
like a std 5' flouro) that would:

You can get ELU packs for converting existing luminaires. The amount of
battery you need is a function of wattage and desired run time.

Ah, interesting (link please)?

Come on when turned on (no!g). ;-)

They all do ;-)

Normally anyway ;-)

Stay on when 'on' and the power fails.
Not to come on when 'off' when the power fails (tricky one huh) ;-)

Aha.

Thought so .. ;-(

The easiest way of arranging that would be to have a DP light switch,
one pole switching the main lights and the other pole switching the
output of the ELU pack.

Oh, ok .. sorta follow that .. even if the 'charge' input to the ELU
fails the output goes nowhere (even though it's trying to light the
light)?

By 'on' and 'off' I would like to think as seamlessly working with a
batch of other flouros in my garage. It can have it's own unswitched
feed plus a feed from the switched lighting cct.

It would probably need a volt-free switch for controlling the battery
side of things.

Or 240v relay tucked away somewhere ..

I have thought I could do something with a relay but that would
probably render the light unit 'out of spec' (FWTW)?

A not uncommon requirement,

That's what I thought .. shrug

but you have to be careful over the
implementation if you have safety regulations to comply with.

Don't 'safety regulations' apply even if you just want to scratch yer
ar$e these days? (or do you mean if it's a public place etc)?

All the best ..

T i m