This IS a quality purpose designed lighting system for your TV. I have an 80" flat screen and this had plenty of light length. In fact I had to cut off about 15". Put it on about 6" from the edge of the screen. We love the effect and how it emphasizes the screen. You cant go wrong with this lighting. I used the USB switch and glad I did. Buy it.

Summary:
For the price, I would expect a MUCH better-constructed device. A much better option is to get another 6500k USB strip like this: Luminoodle Bias Lighting for HDTV - USB LED Backlight Bright Normal White Strip for Flat Screen TV LCD, Desktop Monitors
... and pair it with a switch like this:
https://www.amazon.com/JBtek%C2%AE-Raspberry-Arduino-Female-Switch/dp/B00UR321B6/ref=pd_sim_267_1?ie=UTF8&dpID=41gf2YVj7XL&dpSrc=sims&preST=_AC_UL320_SR320%2C320_&psc=1&refRID=9FZ14TPNDHX134XXTZQ4

The Good:
This LEDs on this kit are good quality, and they're pretty close to an ideal 6500k. The brightness levels are great for a tv which is about a foot off the wall. I can't complain about the performance of the actual LEDs.

The Bad:
The cabling is thin and overall construction feels cheap. The switch box connections started to die for me after about six months, and now only works when the connections are held together with my hands. This basically renders the unit unusable. At this price point, I'd like to see sturdier construction, and maybe a dimmer as well.

Using the Medium kit on my 65" Sony X930c. The color is a bit cooler than I hoped, about 6000k, but still does the job. Without a dimmer it's very bright, but that's what I needed for my particular setup. Easy to install. I expect that after a short time the double-sided tape will fail, but I have a much stronger tape on standby for if/when that happens. Having the on/off switch mounted to the back of the TV makes it convenient to turn it off when it's not needed. Remote control for this would be cool, but not exactly necessary. It's a higher quality ribbon than I thought it would be.

These backlights add just the right ambience for nighttime movie watching, without having to turn on other lights in the room. Nothing really to assemble. Just attach the "stick-on" light strip to the back of your tv, plug in and enjoy! The on/off switch attaches with the "stick-tape" as well and can be placed virtually anywhere on,or off the tv itself. Included are plastic cord organizers which help keep the 2 small cords organized in whatever position you want them in.....I found them not to be necessary in my case. Great product!
....UPDATE>>>>>>> Turned lights on for the second time...entire system quit working. Returning for refund.:( Contacted Inspired customer service.....extremely helpful and apologetic about product not working. Willing to replace immediately! Great company!

This light kit installed easily and quickly. I put them on the back of my Samsung 50" LED which is sitting about 15" away from the wall. I continue to be amazed at how much of an improvement this kit has made to my TV viewing.
I don't understand any of the complaints people have regarding this kit being "cheap" or "too expensive for what you get". It's an excellent value for the price, without question. What were they expecting from a backlight kit? It's a strip of LED's, a switch and an a/c adapter. It is exactly what you need for a better home theater experience.
I almost went the "home made" route with the other guys LED light strip but so glad I didn't. If you're on the fence go for it. I really doubt you'll be disappointed with this kit and the impact it has on your TV viewing. A big 2 thumbs up from me.