I want to install lots of tiny LEDs lights in my garden (at least 50).
I DON'T want high voltage cables in my garden so I am thinking in getting a high power, low voltage transformer to power up these LEDs.
For example, I have two 24V/1.25A (30W) power supplies from Canon printers. Let's say this is a small scale test. Later I could use a PC power supply for 50+ LEDs.
The LED I will use is 1W but I want to run it at about 3.1V/0.1A because at this current it doesn't require a heatsink (it runs at under 37Celsisus - I hope in summer it won't get much hotter). So, I can have 12.5 branches, each branch will have 8 LEDs in series, so 2.4W per branch.
Is this a good design? Any alternative idea is welcome as long as it doesn't involve carrying more than 25V per underground cables.