On Sun, 22 Jan 2017 14:08:57 +0000, alan_m
wrote:

On 22/01/2017 12:04, Scott wrote:
On Sun, 22 Jan 2017 10:56:19 +0000, RJH wrote:



In the interests of science, could you hold a DAB radio close to one
of these bulbs and let us know whether it causes RF interference.


It possibly wouldn't be of too much use to you.

I am trying to find out whether it is possible to construct a bulb
that does not cause RF interference. Your explanation admits this
possibility.

Pound shop products
such as this tend to change on a monthly basis. What you buy today will
be supplied by another manufacturer next month and that is likely to
have different electronics.

If you look at some of the LED bulb tear downs on Youtube you will find
that the electronics in pound shop LED products range from very good to
absolute crap. Often the worst compromises or bad designs are in the
smaller bulbs such as the small down-light halogen replacements - there
is not a lot of room inside the casing.