While I would certainly recommend the use of rear lights in addition to reflectors, I don't think the law needs to be changed. The technical reasons why reflectors are more effective on the back of the bike than on the front. And even though I think adding rear lights is safer, the danger is primarily to the rider and therefore the decision should be his to make. OTOH, a cyclist without a front light could easily run into a pedestrian and cause injury, therefore the law mandating front lights is justified.

I'd also be opposed to adding more lighting requirements since I think they'd just be adding to the laws we already have that are rarely enforced. In California, in addition to the front light and rear reflector we also have requirements for pedal and side reflectors, yet many cyclists have no lights or reflectors at all and there seems to be minimal enforcement.