Deciding whether to buy a fixed skylight or a removable one is an important consideration before you make the final purchase. Compared to fixed sunlight removable one offer more flexibility as it can be opened up to vent the heat buildup and allow fresh air in the house. while some of these models can be handled manually whereas other are more sophisticated and can be controlled by switches or remote controls. Very high end kinds of removal sunlight operate automatically through temperature sensors and moisture-triggered closing mechanisms. There various models of this kind of sunlight available in the market; these include: Manual controls: This is an economical option. It can be operated by an extending rod designed for use in ceilings that are less than 15ft high. For such types of sunlights, a hand-crank is always preferable. Electronic controls: This type of sunlight has gained popularity recently due to the choice it offers for hands-free operations. These can be operated using a wall-mounted switch, or a wall console or wireless remote control. Some of the remote controls can also be programmed to open and close the device at a preset time. Automatic operating devices: The high-end models come with integrated heat sensors that allow the device to open when the heat inside the room reaches a preset temperature and the external rain sensors shut automatically the unit on sensing moisture threat.