Pretty sweet for the price. I found a 9 LED light at my local 99-cent store. Quite visible from 1 block away. Seven modes to choose from. Mounted mine with a nut (recessed in the styrofoam to keep the skull from cracking in case of a spill) and bolt.

What color is the material the LEDs are mounted on? Mine was black and I covered the lights then used some chrome spray paint I had lying around to make a more reflective surface. You might be able to bump up visibility a scosche w/ a more reflective surface. It worked for me.

EDIT: Looks like yours is multicolor. Thats cool if it works for you, but I prefer all red.