On Sat, 21 Jan 2017 19:29:42 +0000, Scott
wrote:

On Sat, 21 Jan 2017 18:33:42 +0000, alan_m
wrote:

On 21/01/2017 18:16, Scott wrote:

As a matter of interest, why to the 12 Volt ones seem to be more
problematic than the mains ones?


Current to be supplied?

10W from 220V, current to be supplied 0.045 Amps

10W from 12V, current to be supplied 0.833 Amps

The low supply voltage power supply is switching high currents.
The mains supply is switching low currents.

That makes sense. I had not thought of that.

I take it this 'switching' is what they used to call 'rectifying' when
I was at school? Would it be possible to fit a rectifier to the
output of the transformer then use DC bulbs? Would this solve the
problem?

Also, I see that the bulbs are AC or DC. Would be be possible to fit
a rectifier and use the same bulbs or would the circuitry continue to
cause problems?

Do you envisage technical developments resolving this or has the
balance shifted in favour of 230V so far as LED is concerned?

As a follow-up I see there are some EMI free bulbs advertised. I
won't post links as some might then question my motives. They seem to
be lower-powered and DC.