I have an actifry if that's what you mean. Its just a way of cooking without using a lot of fat, the way you do in a deep fat fryer. In fact it replaces your deep fat fryer., you only use a teaspoon of oil on whatever your cooking, and you can make chilli , spag bol, as well as other things in it.
ive never heard of ultra violet cooking though. I don't think there is any such thing to be honest. Unless the OP is talking about one of those cookers you can get from JML. Its a glass bowl with a lid and the cooking part is in the lid itself. You put the food in say a chicken, put the lid on and it turns itself on and off when needed. It lights up a lot as well. If it's one of those, no I don't have one, but my mum does. I think if you have something like a chicken it can be a bit awkward to get it out without burning your wrists. I don't think my mum used it more than once though