Do you conserve energy by turning off lights for very short durations like 10 seconds?

It's generally recommended that you don't turn off new 'energy saving' bulbs for periods of 10s. You reduce their life span (and therefore increase the energy-used-in-production-per-hour-of-li… and they use a little extra power when getting started, so for 10s you're probably actually doing worse. Generally speaking, you have to leave them off for more than a few minutes to reduce energy use.