Now You Know
Lighting Options 101
This is a simple video from the U.S. Department of Energy that explains the different light bulbs available to date.
Note that the video is geared to a U.S. market, meaning the $5o/Year is in U.S. In Jamaican dollars (as of 2014) that would be approximately $17 000/Year for the 15 bulbs.
This second video is again from the U.S. Department of Energy, and it explains what exactly are lumens.