Thanks. They use a bank of LEDs rather than a bulb. The casing warns of a danger of electric shock, and has an earthing point, so I'm assuming something a bit higher.At a guess 5v or 12v, you can get DC transformers with 2 wires on the end which you just plug into the wall. I'd wait till 43096s source gets back or see if the bulb has what it wants written on it.
I only read the LED bit so I assumed it was something low, didn't think that there would be a transformer built in3V is not "something a bit higher" than 5V or 12V.
Generally you won't see warning notices on anything less than 48VDC, so the suggestion of 110V is much more likely.
None of which is really commonly available or accessible to "normal" people.If 110V DC is correct a transformer with secondary output of 80V AC followed by a bridge rectifier and capacitor would give a nominal 110V DC. The ratings required and the capacitor value would depend on the current draw but as LED logically that will be low.
The actual LED bank probably requires rather less than 110V DC. Inspection of the internals would reveal if the ' dropper ' is separate or integral to the LED assembly. If the former you could bypass it and supply whatever voltage is at the output of the dropper.
You could, but in order to meet the requirements of the standards, it is very likely that there is a thick layer of conformal coating on the PCB mount components that would need to be removed first.
Perhaps one hope is that separate boards were used by LPA Excil at the time of design, but from their later work they tend to like to include everting on a single PCB.
The highest output domestically available plug in transformer seems to be 50V DC. Getting 110v isn't in itself a problem, a UK to US power adaptor would do that. However it would still be AC. I need to be able to rectify that.
I do retain the second option of gutting it and replacing the innards with a 12V system.
..... getting 110v dc will be difficult and expensive.
Alternatively a kit of an LED strip and small 12v plug transformer is £15-20 on Amazon.That depends on your definition of difficult and expensive.
My approach if a little under 110V would suffice is two small transformers each with two 18V secondary outputs. The smallest other than PCB mount will be around 12VA and the regulation of small transformers is generally around 20%. With the secondaries in series the total will be around 80V DC at 50% load. Rectify this with a small bridge rectifier and follow with a 100uF capacitor so the ripple is around 10V / 10%. With a 100mA load the nominal output would be around 100V DC.
With a higher input e.g. one 18V transformer and one 24V transfomer there would be enough overhead to regulate to 110V DC without too much heat dissipation but to me over the top to replicate a rail supply for a lamp.
Add fuses and fuse holders on both input and output. Parts cost I guess around £30 plus a suitable enclosure. If this was hidden just a simple diecast box at perhaps £10, if exposed something suitable and decent looking would cost rather more.