Lighting Showroom
Details: 7% off for purchases (usually sent to people that have bought from them)
lightingbuff.com
Details: Get 15% Off Your Order Over $750 Plus Free Shipping.
Crescent Harbor Lighting
Details: Free Shipping on Order over $250 to Canada
WOWOOO Lighting & Gifts
Details: 5% off all orders. Not sure when its valid to.