Hi. I need an electrician to come and supply and replace between 7-10 halogen lightbulbs at my office premises. Some halogens on the stairs are approx 20ft up, whereas others are about 10ft high so you will need a set of ladders. In other areas of the building there are some lights (tubes) that need supplying and replacing. I anticipate the job should take no longer than a couple of hours as it is simply replacing.