Sign up for an Award
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
There are many switches in building, hall, hotel, and house. However, it is impossible to turn off the switch which I choose.
You may repeat to turn on and turn off the several switches before you want to turn on one of them. You need to figure it out that this may effects of power consumption of a fluorescent light.