I think finding affordable and chic light fixtures is probably one of the biggest challenges when decorating a home. Here are a few of the sources I have used.
Dining room light:
I bought this light on Ebay and got an amazing deal, $50 bucks; but the seller I used is no longer offering it. Here are some other sources for this light, unfortunately not priced as low as I was able to get it for.
Kitchen sink light:
I found this light at CSN Lighting for about $83.
Kitchen table light:
This is actually a "pendant lamp" from CB2 - $50. It is meant to be plugged into a wall outlet, meaning you would have to string the cord along the ceiling and down a wall. If you don't like that look you'll need an electrician to adapt it to function as a regular pendant light, luckily my husband was able to do just that for me so I didn't have to pay anyone.
There were some seriously fugly lights on our garage exterior when we bought this house, we replaced them with these beauties from Home Depot, priced at only $32 each.
Here are some other affordable fixtures that have caught my eye:
Urban Outfitters Chandelier - $48
CSN Lighting Capiz Pendant - $55
Ikea FOTO Pendant - $30
Ikea OTTAVA Pendant - $30
Hampton Bay Wall Sconce - $45