Kosher Lamp is a lamp that you can use on Shabbat. Instead of shutting off the light switch, which is not permitted on Shabbat and Holidays, you can twist the shutter around to effectively block out the light. This method of lighting is approved by major Orthodox Rabbis. Now, you can have the benefit of an illuminated room, without having to sleep with any light. Kosher Lamp makes a great gift; something that all Jews can no doubt enjoy! Includes one fluorescent bulb. Kosher Lamp Regency features a more powerful bulb and a more stylish design.