LED taillights on chevy s10?

[nickcool]

i put led bulbs in my taillight's on my s10. and when i turn my turn signal on it blinks fast like it detects a blow en out bulb but i don't have a blow en bulb. why does it do this. i like it when it blinks fast. but is it illegal for a turn signal to blink fast? cause from a distance it looks like strobes..