When you nurse your baby at night in the early days, you will probably want some light to see what you're doing. However, it's very important to keep the room as dark as possible so baby gets back to sleep quickly, and you avoid the dreaded day/night confusion.
A dimmable, touch-operated bedside lamp is perfect for this. With a quick touch, you can turn on a super soft light to nurse by. I had a fabulous Autotec one with an autofade option, which slowly dimmed it to off in a 15 minute time period. Sadly, I can't find it online anywhere. But this one may be the next best thing. (Note: I haven't had the chance to personally use this, but based on the positive reviews I would give it a shot!)
Update: Casper (the mattress company) has just made a pricier, smart-phone enabled alternative called the Glow lamp. It looks like it will be great for middle of the night nursing. (It is even portable!) Mine just arrived, and I will be reviewing it here!