Cambridge Energy Alliance is hosting a free bulb swap where residents can exchange incandescent or CFL lightbulbs for energy-efficient LED light bulbs. Residents can swap up to one standard (A19) bulb, and up to two recessed ceiling bulbs (BR30), per household, while supplies last. Both sizes of LED are 60 watt-equivalent, soft white bulbs.

The details: Saturday, 3/30/2019, from 10AM-2PM. Cambridge Winter Farmers’ Market, 5 Callender St.

CEA will also be accepting old CFLs (compact fluorescent lightbulbs) for safe recycling through the Department of Public Works, for residents that want to dispose of additional bulbs.

LED bulbs use 5-6 times less energy than incandescent bulbs and 40% less energy than CFL bulbs, resulting in significant savings on energy bills. In addition to financial savings, LED bulbs are mercury-free and can last up to 20 years.