OK, my recollection from a web site about LED use said to figure a
voltage drop of 3.4 volts for the white ultrabrights leaving about a 9
volt drop for the resistor. At 600 ohms, this gives about .015 amp
through each resistor and LED. Yes, the correct resistor wattage is
less than 1/4 watt but I hate blowing resistorswhen odd things happen
and space saving is not a consideration here. Radio Shack had nothing
even as alrge as 1/4 watt less than 1000 ohms.