Low voltage outdoor deck lighting is easier to install than regular high voltage lighting as the cables do not need to be protected. It is also more economical. There are a few things that you will need. First, obviously are the light fittings. These come in many different designs from up lighters and recessed lighting to flood lights and post lights. Choosing the light fittings will be determined by the look and ambience you wish to light your deck with. You also need to decide on the power out put of the light fittings. This will determine how bright the lights are.
Low voltage outdoor deck lighting requires a transformer. The size of this transformer will depend on the power output of all the lights added together. For example, if you have 5, 18 watt lights the total output will be 90 watts. It is recommended that the transformer can handle 25% more than the total output of the lights. You should also choose a transformer that has extra power in case you want to add extra lights at a later date.
Before you install your low voltage lights you will need a power outlet to power the transformer. You will need a GFCI receptacle. This should be installed by a professional. (GFCI means Ground Fault Circuit Interrupter. In the UK this is called a RCD - Residual Current Device or Safety Switch). These devices should be used on all outside electrical equipment to prevent accidental electric shock.
The last thing to do is to work out how much wire is required to connect all the lights to the transformer. If you are planning to install a number of lights it is a good idea to draw a plan so you know exactly where everything is going to go, you can then work out the length of your cable runs and allow a bit extra. You may wish to route the cables under the deck so they are hidden so this may need extra wire. The gauge of the wire is also important; please check the wire you buy can handle the power required by all of the lights. I recommended 12 gauge cable for a 300 watt transformer.
You may also wish to consider installing a timer for your lights or even 'dusk till dawn' sensors to control your lights. Don't forget, when testing your lights in day light you will need to cover the sensor to make it think it is night time or else the lights will not work.
With everything installed you can sit back and relax and enjoy your deck well into the night.
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