So I've installed around 1600' of different led strip lights over the last few years, and these are the best standard density strips I've used yet.First off, the adhesive sucks on all led strips I've ever used. If you have metal, plastic, or finish grade wood it works fine. But if you have an uneven surface, I use screw clips and contact adhesive to stick them down.I also recommend you solder joints between pieces of strip (only hook up one strip to the source, don't daisy chain them).These are the most consistent strip lights I've ever used color and quality are excellent. Plus they're UL listed!