There are too many apple to orange comparisons to be made. My personal experiences are wrought from a tendency to pay a little and expect a lot. 25K, over 1.25 hours, each way. Though this may be unlike your commute, and our lighting needs may be different, I have experienced just about anything that can go wrong with bike light systems I have built or commercially available systems I have bought and modified. Decide what your needs are by considering your brightness needs over the length of your commute.
Some decisions are easy.
Sooner or later, in your decision process, you will have to determine whether you need to SEE or just be SEEN by the light on you bike. Will you have to illuminate the street to avoid all the dangers we know too well or are simply advising other road users of your existence. The brighter your light, the further you can see and the more likely a motorist will see you. Brightness has a price though. Sometimes a very big price.