Thanks to an intrepid team of mid-evening adventurers, the enthusiasm of the building manager, and 77 new compact fluorescent light bulbs (CFLs), Harvard’s Expository Writing building on Prescott Street has entered a future of big savings. The light bulb switch took less than an hour to complete and will save the University thousands of dollars in the years to come.

The building’s old 52-57 watt incandescent bulbs and used at least 17,500 kilowatt-hours (kWh) a year of electricity. They were replaced by 15 watt CFLs which demand a significantly lower 5,000 kWh a year. This translates to about $2,000 in energy savings in one year alone and at least 5 metric tons of greenhouse gases per year that will not be released (all for one hour's worth of work and $125 worth of bulbs).

The tremendous savings that the Expository Writing building’s switch will yield has prompted the FAS Green Program to make further plans for conducting audits and potential switch-overs of other wood-frame houses and offices at FAS.