My husband and I were in the same boat .. not knowing anything about interior lighting styles and lamps for our new home. A friend referred us to http://www.lighting55.com We’ve been going to them ever since for any lighting needs that arise.
There are lots of sites out there that sell LED lighting now but also shops are starting to push them quite a bit as they are more eco-friendly and also a lot more durable.
We just installed LED spotlights in our living room and bedroom and actually it's not as hot as I thought it would be as we have a dimmer connected. We used these guys http://www.click4leds.co.uk/ and they were helpful. Make sure you get the right wattage though and fitting for any shades or lamps you are trying to use them with!