I dont know best practice cause i never done it myself, but i could happily say what i would try out, at least for the over the work top bit, especially if your wanting a top end feel for it, with good light quality in case you were every instagraming your cooking or other photo related stuff. I got a product for you but you would have to ask Bridgelux for details of were to get the rest parts; they been help full to me before so im sure theyll help
Id go for some type of 90° angled led profile to attach to the corner bit, which would take the led strip and sort of make it to the long side of a right angled triangle. Preferably with a diffuser cause direct leds are bright to look at (though if youre taller than the bottom of the cabinets you wont be seeing the strips themselves, only if you squat a bit). Usually these would have slide in fastening, but you need to think things thru to get it right before you start fastening. If theres one side that is open and not blocked by wall or other thing then its easy, just slide in one at a time, making sure you make the connections between the strips as you add more, remembering you need to have longer cables and some idea for cable management at the end of the series. Youd be using series connection in this example.
If both ends are blocked your a bit stuck but what you could do is to slide in the strips pre mounting to wall/cabinet, making sure you leave some extra space so they can slide left/right. Thru these gaps you should be able to drill and fasten screws, and then slide into desired configuration (hopefully covering any screw holes!). You should probably do the wiring at this point aswell.
If you have a covering diffuser you should have to worry much about waterproofing, maybe the ones at the end of the diffuser. There are ways of water proofing the pushin connectors, high end would be liquid electric tape. I havent checked, they might be solder connection but that could even be easier practicly; its bloody hard making a really small cable peeled on both ends to get into two opposing pushin connectors. Maybe this requires help of a pro, but if you found yourself here im suspecting hubby may even be a grower with practical skills
Be sure that youve gone thru all the practical parts of the installation in your head, or just do a dummy install with no screws first cause its easy to get messed up the first time doing this.
You would be using series connection but there is always an upper voltage limit. If you want more strips than you can fit inside that limit then go for several series strings in parallel, making sure each leg/string is the same length and voltage.
Strips: bridgelux vesta edge (google this for datasheet and info, use modelnr in octopart for dealers). They are extra small, 6mm wide so perfect in size. They come with cold white and warm white channel: if you get the right driver and dimmer solution you shoul be able to dim seamlessly between warm thru neutral and all the way to cold white.
Driver: you either need two drivers, one for each channel or more advisable some type of current splitter with regulation so that you can send the current from your driver thru to each channel.
Bonus is that the vestas are 90cri color rendering, more vivid colors especially reds.
This may not be what you were asking for cause its prolly an expensive build were youd need to order a few parts online but i suspect that if you managed to find the RIU led section youre after something really nice.
For driver solution and profile check with bridgelux - they picked up the phone on me during business hours and were quite helpful but youll probably need to follow up by email.
Please post your build and if you find a nifty driver solution for dimable current switching please post that aswell. Cheers
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