In the main, installing LED strip is a simple enough affair, you'll need the strip and an appropriate power supply to power it. In this post we will deal with single colour strips only, RGB colour changing deserves a section all of its own.
Strips come in 5m reels for a reason, thats the maximum length that is able to be powered without overloading the strip. If you need more than 5m you cant just tag it on to the end of your 1st strip as this would overload the 1st strip, the solution is to wire in parallel, which means each 5m length has to receive its power direct from the power source (transformer) and not from the end of the previous strip, here is a visual example of how to power 10m of strip.
I often get asked about dimming LED strip and if its possible, the answer is YES, its actually very easily done with the addition of a suitable dimmer switch, these dimmers are powered by 12v and come in 2 main types and are quite inexpensive to add to your installation. There are RF dimmers and regular style dimmers. The wiring sequence is Mains>transformer>dimmer>strip. The dimmers for LED strip are powered by 12v and should never be attached to mains power.
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Before and after pics of how a LED strip can give you an even light throughout the length of the installation