Turn any lighting installation into a light sensor night light with an e27 dusk til dawn 3w bulb perfect for use in hallways on landings or in childrens rooms the soft 3w bulb gives a soft glow casting enough gentle light to read by simply replace your standard bulb with the e27 dusk til dawn bulb and your lamp or light fitting will sense darkness to automatically turn on at night and then off again in the morningr r note take care to place the bulb at least 15m from surrounding light so