Adventures on a Folding Bike
When I first received my bike, I had ordered a light set that attached to the handle bars and seat post. It worked well.
But then I added a front basket and it mostly interfered with the front light.
In order to make the white front light more visible and much more useful, I ordered a light that is mounted using the front fender mounting hardware. It is strong and keeps the light free from interference.
Also, I sometimes would carry things on my carrier rack (like a carrier bag or backpack) and the light on the seat post could be interfered with as well. So I added a red tail light to the rack to make it visible no matter what I may be carrying.
These two light were very affordable from my favorite big box store website. Very convenient and since they use bright LEDs, they will last a long time and are very visible when needed.