MotoBuddha wrote on 11/11/11 at 08:00:09:I think the faster blinking attracts more attention because it's unusual. It possible for other drivers to accidentally look away between normal speed blinks.
Not sure what your state requirements are, but in PA your signals have to be between two frequencies, i think between 60 and 120hz (between pulsing once and twice per second), so this might be a legality mod rather than personal preference.
I'd also say go for the flasher. It is easier to install (no soldering!) and keeps the power/heat benefits that come with LEDs. actually, don't take my word on that, i've just been under the assumption that adding resistors negate the power (and heat) saving benefits over standard bulbs and that flashers don't. maybe someone more versed in the lighting department can verify?
If you did want to go the resistor route, my initial guess would be to take a multimeter (ohmeter) and measure the resistance of the standard bulb, then of the LED array, and just add a resistor inline that adds up to about the same as the bulb. but that is a guess off the top of my head. some things in electronics are more like magic than science.... to me anyways