My sister got some for her TV and has been happy, but it's some random Chinese brand. What brands should I be looking at? I just had a cheap lamp behind the TV for when I don't want it pitch-black, but my dad wanted the lamp and offered to buy something to replace it, so it seemed like a good opportunity to get some bias lighting. Are you using something you're happy with?
The best way to determine what you might need is look at Amazon, there are a number of companies that sell bias lighting with varying prices and in terms of quality, reliability you essentially get what you pay for. I bought some from a company called "Luminoodle" whom after I had one set fail after 2 yrs. they sent me a brand new set free. I currently have a 77" OLED and previously a 65" LCD/LED and after installing it on these sets, I wouldn't know what to do without them. The better quality lighting will give you numerous colors, brightness levels and a remote and you connect it to the USB input on your television which turns on and off with the monitor. Your cost will also be determined by the size of your monitor as well. Incidentally, no matter how slice it, they are ALL manufactured in China.
If you watch television in a relatively dark room, the bias lighting is really all you will need and especially with LCD's and their problem with black levels, it gives the perception of better contrast which, of course, improves black levels. OLEDs, it doesn't matter, in either case, with bias lighting the picture on the screen doesn't have to be as bright and overall, considerably easier on the eyes.