Bro, this is very subjective, its depand on the type of headlight you are using and how high is the angle of your beam. Basically projection headlight with proper beam angle should be quite safe as its not too glaring.
Any1 interested?!?!?! We can do it once a week during weekdays at night......if we get enuf ppl then we can start....the fees is around RM50/month in USJ 21 new badminton courts....heard it is a big 1 with around 20...