Selecting the correct length of lightstrip for your TV is paramount for an ideal installation. More on this topic follows below. Be aware the adhesive strip on theses lights is very strong! If your initial layout does not go all the way around, or is too long and overlaps, trying to remove the strip so you can redo the installation can be near impossible due to the strength of the adhesive strip. If you attempt to remove the strip by pulling it off its possible you could damage the strip.As a suggestion when preparing for your installation, do not peel the backing off the adhesive strip just yet. Instead, using masking tape or painters tape - temporarily- attach the light strip to the back of your TV, moving the light strip in or out from the edges until you find the spacing needed to successfully make it around the entire perimeter without coming up short. Where to place the strip, how far in from the outer edge, is there an ideal placement? It seems many agree ideal placement for these light strips is around 2.5 inches in from the edge of the screen although the included installation instructions simply say to install them within 4 inches of the edges. In my particular installation with the XL kit on my 65” TV I discovered placing them 4 inches in from the edge I had over a foot of excess but placing them at 2.5 inches in from the edge I was a couple inches short. In the end I discovered by placing the outer edge of the light strip in 3” from each edge I was able to make it all the way around my 65” TV perfectly with no unlighted spaces and no excess overlap. Practice testing the placement and you will be much happier with the installation and end result.Some have stated they purchased the correct kit for their TV according to the information provided, but in the end… the kit was not long enough to surround the entire perimeter on the back of their TV. They were either short several inches or a several inches too long. To avoid running into that issue I read the description for every kit.There are various choices for the Luminoodle kit based on size and color options. The screen sizes listed within the variety of available options to chose from indicates the XL is for 41”-59” TV which seemed to indicate it would be too small for my 65", however if you view the various images to the left of the listing you will see an image showing a diagram of different TV screen sizes, The image for the XL indicates it is good for 55” to 75” which should work for my 65". See attached photo in regards to confusion.I wanted to make sure the kit I purchased would make it around the entire perimeter. Should I select my kit based on the diagram showing TV screen sizes and corresponding kit or the make my selection based on the size indicated in the various size and color option available to select? After much research I ended up ordering the X-Large for (41-59”). Regardless of the size you order, as you might imagine, the larger you make the height and width of the rectangle of lights on the back of your TV, the longer strip you are going to need.My TV mount is fully adjustable. During my installation placement experiments I discovered when the light strip was placed very close to the outer edge of the TV and the TV close or flush with the wall, the lighting brighter - but - the light strip produced bright spots where each LED abutted the wall. Whereas, when the TV was pulled further away from the wall the light had a chance to disburse into a more even glow. Moving the light strip in further away from the outer edge of the TV eliminated the bright spots around the TV and produced a more even the glow but was not as bright. I was able to compensate for the brightness using the remote and turning up the brightness level. Very pleased with the end result!