Most of the time there will no be much of a need for motion sensor lights in the daytime. Yet, there may be some instances where you need more light in a room. But, the issue is most models are designed to activate only at night because otherwise, energy would be wasted because nine times out of ten, day-time activation will not be needed. Still, certain sellers, such as Mr. Beams, may do something for you if you request it specifically.