If the 60 Hz (as others have corrected you) flicker bothers you how do you
watch TV (59.97 Hz vertical) or go to the movies (48 Hz ficker rate)?


Have you actually seen LED xmas lights with this in person? They have a
50% duty cycle and zero phosphor persistance, the flicker is not subtle,
particularly if you move your eyes and catch the lights in your
peripheral vision. A TV does flicker, but the phosphor persistance makes
it far less apparent. A computer monitor with low persistance phosphors
running at 60Hz is unbearable though, instant headache.