Flipping the switch twice makes the light stay on. A dimmer is built into another one of these bulbs so no dimmer switch needs to be installed. By flipping the switch one, two, three or four times, the light dims from 100 watts to 20 watts in steps. Most typical small night lights use either a four or seven-watt bulb. These give off as much light as a standard 20-watt bulb.
Some models have adjustable shades to direct and dim the light.
There are also many theme shaped night lights available for children - colored crayons, clam shells, pencils, baseballs and gloves, Peanuts and Flintstone characters, etc. Update Bulletin No. I am planning to build a house and want to use staggered 2x4 studded walls. This will allow for two layers of insulation and no stud in contact with both the inside and outside walls. This is effective on walls with few windows or doors.