The problem with the LED DRL's is they are so bright that some drivers at night believe they have put their headlights on yet the rear of the car remains unlit which can be very dangerous. Whilst a few makes put both the front and rear DRL's on, the majority only light up the front. The law should be changed to make it compulsory that all new cars built after a specific date that when the front DLR's are lit the rear lights also come on. Not ideal in bad weather as everyone should be driving with headlights on and rear fog light's on when visibility is poor.