Thanks to the generous support of GE, HWP and BELCO, this initiative encourages members of the community who have not considered or who cannot afford to replace their existing incandescent bulbs to try CFLs.

At the same time, the Bulb Swap provided the general public information on how to safely dispose CFLs and how to handle them should they break.  bulbswap-banner.png

bulbswap-loc1-line.pngOver a four day period in February, the Greenrock Bulb Swap took place in three locations around Hamilton and one location in Warwick.

Close to 980 individuals participated in this exchange. Close to 65% of the participants did not use CFLs in their homes.

Just about 1,960 CFL’s were given away for FREE. By using our calculate energy-savings calculator (see below), find out how much annual savings the Bulb Swap could generate. Assuming CFLs being used are equivalent to a 60 watt regular bulb, and for 5 hours per day, the Bulb Swap would save about 164,542 kwh of energy that translates into an total annual savings of around $60,000.

bulbswap-loc2-exchg.pngBroken down, this would amount to an energy reduction of 84 kwh per CFL which equates to an annual savings of around $31 per CFL. Do the math, the more CFLs used for those lights that are on for long periods, the higher savings generated annually. So as the banner below states – SAVE MONEY by SAVING ENERGY

This handout was distributed to all those who participated in the Bulb Swap. 
Switching from traditional light bulbs to CFLs is an effective, accessible change every person can make right now to reduce energy use at home and prevent greenhouse gas emissions that contribute to global climate change.

Lighting accounts for close to 20% of the average home’s energy bill. CFLs use up to 75% less energy than incandescent bulbs, last up to 10x longer and provide a quick return on investment. 

Studies suggest that if every home in the U.S. replaced just one incandescent bulb with a CFL, in one year it would save enough energy to light more than 3 million homes and prevent greenhouse gas emissions equivalent to those of more than 800,000 cars.

CFLs contain a very small amount of mercury sealed within the glass tubing – an average of 5 milligrams – about the amount that would cover the tip of a ballpoint pen. By comparison, older thermometers contain about 500 milligrams of mercury. It would take 100 CFLs to equal that amount.


Join the Greenrock Bulb Swap Survey
Register and participate in our Greenrock Survey and you will receive a ‘buy 1 get 1 free’ coupon for a new CFL upon registration and then when you return in 6 months time.  And when you return at 12 months time, you are entered into a draw to win a FREE stainless steel energy efficient Microwave.

To complete the study, look at your current monthly BELCO bill.  Then, look at your BELCO power meter outside and note the reading on the meter.  Beside this meter reading number, note the date and time you have made this recording. 

Register to join the survey today!
Just fill out the Greenrock registration form . Once you have registered, log in to You will be taken to your profile page where you will see a link to the Greenrock Bulb Swap Survey.

If you are already registered on just Click Here to go to the survey. You'll see the link on your profile page.


Those who initially register by March 31st, 2008 in the survey and submit data to the survey at the 6 month and 12 month timeframes will be elligible for the Draw to win a FREE Stainless Steel Energy Efficient Microwave from Home Zone (division of HWP).  Draw will take place on Tuesday, March 31, 2009.  Winner will be contacted by Greenrock and will be announced on our website.

There is a range of five NEW Design CFLs that you can choose from when you are elligible for a 'Buy 1 get 1 Free' Coupons.   Here are three samples of what they look like.  Even more reason to Join the Survey Now.

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