Chandelier Lifts lower high chandeliers, so light bulbs can be changed. They cost between over $1,000 to purchase and install. This video shows how to build and install your own for under $150.
There will soon also be a part two at HowToLou.com.
Jam a screw driver or small pry bar in one corner of the cover and pry it out, pull it forward to get to the bolts, slide out tow hook, pull cover completely out.