Cold Windowsill Woes: Artificial Lights or Heat Mats Are Better

West Window Too Cold in Winter? Don't Rely on Sunlight Alone

A student’s west windowsill dropped to high 40s°F at night and high 60s°F by day. No daytime heater allowed, no artificial lights, can't move plants to school.

Shop Lights on a Timer Solve Both Light and Heat

A two-tube shop light (~80W) on a timer provides light and gentle heat—far less power than a space heater. Heat mats (e.g., Greenhouse Megastore) also work. Alternatively, ask a teacher to host plants in a sunny, steam-heated classroom.

Good Growing!
Jeff Dallas
Sarracenia Northwest
https://www.cobraplant.com