When you are considering which lamps to use, you will obviously look at energy efficient lighting and developments in LED mean that you can acheive better light quality than old lamps, while using far less electricity.

Another thing to bear in mind is the expected life of the lamp:

Traditional Tungsten 'lightbulb' 2,000 hours
Halogen lamp (i.e. 35W, 50W) 3,000 - 6,000 hours
Fluorescent T8 lamp 15,000 hours
Fluorescent T5 lamp 25,000 hours
LED up to 100,000 hours

As you can see, spending money on LED lamps will benefit you long term.

You might use 50 Tungsten 'bulbs' for one LED!