Lights - Am I just tight?

[looksfast]

So, the mornings and evenings are dark and I am considering cycling five miles or so to the station down unlit canals. It so happens that in this months MBR there is a test of lights - great! I completely understand why off road one might need two front lights, but given that there will be some on road to my journey, I also need a rear light as well for part of the journey.

So in my mind, I think that I want half decent lights, but nothing extravagant. I am thinking that maybe I need a budget of £100 at most. Then I read the tests in the magazine and one of the lights (not the winner!) was over £700!! Who spends that on a bicycle light? It wasn't even the only one at that sort of price. Am I being naive about the cost of these things?

I would use an old bike for the station as it needs to not tempt the criminals, if I went all out on lights, they would very soon be worth more than the bike itself. Any other ideas?