5-stars for the price, a clean looking installation. and if you only need 90 degree connection (left or right). These L-connectors makes a nice clean looking installation. Photo-B show the final installation on the LED strip.
If you need an angle that is not a straight 90 degree, then a wired connection might be better for you. These L-connector have two piecing pins to prevent the strip from pulling out, making a better secure connection. Other brand just use pressure on the contacts to secure the strip in the connector. Also note that these can be used as a straight connector by inserting the LED strip on both end of the connector without using the L-connect circuit board.
After reading all the reviews on this product and other reviews on other brands for LED connectors, it seems that 15% of the reviewers have issue with bad connections via strip not working, cross color, or not all lights working after hooking everything up. After having used these, and initially had a bad connection, I looked at what could be wrong. Then I realized that this is not just a cut, insert, and snap shut the connector process. It will work every time. You need to take the time and do it right. I found it much easier to assemble and test all connections before installation. Test each connection as you add a strip. If doing a room, assemble one corner at a time and test it before sticking it to the wall.
After cutting at the proper cut line on the strip, remove the foam adhesive backing on the back side under the copper strips, about a ¼”. (photo-1). You should have a very thin strip to insert into the connector. The connector has a thin slot at the end, that the strip is insert in (photo-2). The strip end is not push into the pins from above. While inserting into the slot, push with the copper strips going under the 4 pressure contacts. This may seem simple, but I notice when pushing in, one contact may go above, not under. Photo-3 shows the bottom connect underneath and not making proper contact. After checking that all 4 copper strips are under the pressure contacts on the connector, give it a wiggle to make good contact and make sure it is all the way in. Insert the L-Connector circuit board (verifying connection) and do the same for the connector at the other end. Make sure the (+) side of the strips are connected. Do not snap shut until the connection has been tested.
Things to check for a good connection.
1) Strip is inserted under the lip
2) Copper on strip are under the pressure pin and push all the way in. Wiggle to make a good connection
3) Do the same for the L-connector circuit board
4) (+) are aligned all the way through
5) Apply power and check all lights are working before snapping shut
6) If connection is working, snap shut, I also use a plier and give it a slight squeeze to ensure the two piecing pins are punched into the strip to hold it in place.
Photo-4 is photo of proper connection and area to check.
Not quite understanding the right and left angle in the reviews and question section. Photo-6 shows the connector being use in a right and left direction angle.
Some complain about the labels on the L-board on reversed or the RGB or in different order and therefore not usable. As long as you keep the LED strip (+) connections on the strip connecting to the (+) connections to the LED strip on the other side, the RGB will stay aligned regardless of the labeling on the L-circuit board. See photo-7. This is show that the LED strips (+),R,G,B are in alignment regardless of the connector labeling. These are straight through connections. As long as you align the ends of the LED strips in the same order so that the (+) are lining up, either or top are at the bottom, the rest of the strip will match up. (photo-7)