On 07/01/17 18:10, Brian Gaff wrote:
In theory they are of course unsafe if a child unscrews a bulb, but in
practice, I have had no problems with them as long as you always fit a fuse
bulb and that the place where they go into the holders are well sealed.

I suppose an RCD or even a small 1:1 isolation transformer could be
added to improve safety, if these absolutely have to remain in use.

--
Adrian C