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"For 20 LEDs, try reducing the resistor to 56R. This will limit the current to about 40mA RMS which is an RMS current of 10mA though each LED."
But i need about 20~25mA per LED, the LED will not even turn on with 10mA. D:
I will use 40 strings of 8 LED with 1 Resistor each string in DC mode.
It will be something like this:
__=___O____O____O____O____O____O____O____O__
.../\......................./\
....\resistor..............\LED
I will use your method colin55 when i'll build a different chandelier, that will have 2 paralel strings of LED in series.
That will be a 115 LED in series in each paralel string, it will be big lol.
About the white LED at 17mA, they would not give full bright at 17mA, at least my LED, i've tested, and if i install a 470Ohm resistor the LED look kinda dim, but if i install a 390Ohm resistor, the LED becomes ultra-bright. And if i'm not mistaken the LED and the resistor got warm, i mean, very warm, when i've used the 390Ohm resistor, but the LED kept on all the night and didn't burn.