Sounds like a bit of a bodge. The problem is of course what exactly is
overrunning a bulb if you are using AC? It all depends on whether the
voltage rating they say was RMS or peak.
Why have one higher wattage. I'd have thought that might look a little
odd.
Brian

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This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"Jeff Layman" wrote in message
...
I finally got round to replacing the three 12V MR16 bathroom lights.
Annoyingly, the cut-outs weren't the same diameter as I had thought. The
originals were about 78mm with a bezel of 105mm, the new ones 73mm with a
bezel of 85mm. Luckily I had a decent supply of filler...

What was interesting was the 12V electrics. I had thought all the bulbs
were 20W, as that was printed on the one that blew. But there were two 20W
and one 35W bulb. These were run from a Ring 12V AC 65VA transformer. So
it was being overrun (75W load in total). There was "130 deg C" printed on
it (seems remarkably high to me). It was partially potted, and the potting
material had cracked in a couple of places.

The wiring was odd, too. The lights were piggy-backed in parallel - 20W -
20W -35W. The first two had multistranded "speaker" type cable. Looked to
me 5A rating at best. The second 20W lamp had more cable for the 35W
lamp - but it was 1mm T/E!

The new GU10 IP65s look much better.

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Jeff