Hi, I've been trying to get some information in general on these appliances,
like efficiency and safety and stuff. But not been able to form a yes no
opinion so far from scant stuff I have found so far. Like what is different
about these tubes to ordinary lighting halogen tubes, and how long should
they last. And ,basically ,are they any good!? They are not for sale in
most large UK department stores, which worries me!

Thanks,
David