//For example, if you need to replace a 60-watt incandescent bulb with an LED bulb, then divide 60 watts by 5 to get 12 watts – that will be a good estimate. But efficacy varies wildly from manufacturer to manufacturer, so it’s best to check the Lighting Facts label and try to match lumens//
In the link supplied chaps ... as I was saying. Get the right fitting or all else is pointless. Also beware that if the light is on a dimmer switch you may have to change the switch for it to work. There is no danger, as such, in fitting an led lamp(for ginge) to a dimmer used with the old "hot glow" bulbs but I would not like to chance an older type buld through an led dimmer switch. I have changed every fitting in the house to operate lred lights and that includes the fluorescent fitting. Taking the Fluorescent fitting down and replacing it, in the kitchen, would have been a bit involved and may have needed plaster and paint. So I stripped it down cleaned it till it was pristine again and put an led tube in. Great move too. As Lady said it is great in the kitchen because there are no shadows or shady areas on the worktops, or over the sink. So I am told.:))