The light is diffused by the frosted jar and give the appearance of sunlight emitting from the (warm coloured LED lights are used to give a more natural and warm light). You may have noticed that there is no switch on the sun jar - in fact there are no visible controls at all - there is a clever light sensor inside that automatically activates the lights when it gets dark or lights are turned out! * Mason Jars are not only beautiful but by their very nature they are completely water tight - so the Sun Jar can happily be left outside in any weather conditions. A perfect garden light or night light for a kids bedroom. *there is an override switch inside the lid to turn off the light at night and conserve battery life.