开云体育

I would add only that the brightness you want and need will depend on your room lighting. If it's bright, your LEDs will need to be brighter (use lower resistances and higher currents) for the same visibility than if your room is relatively dim. I find I need more light than when I was younger to see to rerail equipment and do other precision work. So, again, YMMV!????? :--)

Don W