I changed from a 35w 8k (really blue) to a 55W 8k (light aqua), the amount of light i get now is crazyyy high! i have them at the correct angle, but i still get plenty of flashes.... No police officers have said anything about them though sooo... oh well?... If i were to reccomend a bulbs, i would say 5k on 35w so you get nearly the max light. or an 8k 55w to filter out a little of the light.