Here’s an update on how my buttercrunch lettuce is doing. I bought a small light for cloudy winter days and I have dialed in the watering schedule. I have a timer for the light that turns it on at 7:00 a.m. and off at 9:00 p.m. I also have a timer for the air pump that turns on for 30 minutes every two hours during the day, and for 15 minutes every 4 hours at night. The lettuce seems to be doing very well.