It's driving me out of my mind; that's why it's hard for me to find

(apologies to Bel Biv Devoe)

Have been in a bit of a whirlwind couple of weeks, what with homework, strategy games, case competition things, and planning a hugely major event, but I give you this thoughtful video from Durham-based Cree, Inc. Makers of quite impressive LED lighting.



I wonder how it affects the payback period when you factor in the effects of incandescent on heating and cooling. Also, I wonder how you'd quantify the additional carbon emissions and footprint reduction.