Lights can be made complicated or simple. I like it simple.
They are there for me to see without burning the retinas out of car drivers, who then, justifiably, full beam me and I also use lights to be seen.
My commute is 20km and its pitch black.
On the front I have 2 Busch and Mueller Ixon premium lights. They were £30 each and were a bargain. I understand £60 for 2 lights is very expensive, but they are worth it. Whats more I am worth it. As a supplementary light I have a helmet light. I think having a light that moves is important as a stationary light can be missed from certain angles or in queues of vehicles if it is low down.
My rear lights are two clip on Smart lights. The bottom one clips to my saddle pack and is stationary. The second one clips to a strap inbetween my shoulder blades on my viz vest and is flashing. Again, having a light higher up gives better visibility.
This is my regular set up and works for me.
When it comes to safety I dont mind spending a few pounds. The important thing is to buy good quality gear to start with and not waste lots of money on cheap Chinese crap and then realise you need good quality gear.
The B&M lights show another issue
MOst bike lights are very poorly designed.
Vehicle headlights have a "beam shape" that focusses light where it is needed and prevents dazzling of other road users.
Apart from the B&M lights there are very few lights in the UK that do not simply have a full unfiltered beam. Hence even when set up correctly the upper peart of the beam can dazzle and is wasted energy
I cannot find an article that has the tow types in the same comparison, but these should illustrate the point
This is a B&M filtered beam
Now compare with an unfiltered beam