Pre-made LED cluster lights are an easy way of having a bright front light on your bike, but because they use cheap 5mm LEDs the beam spread will mostly be quite narrow and give you a spotlight effect, the 5mm LED in my PhotonLight torch has a really nice smooth beam spread but because it's made by Nichia it's not cheap or easy to get hold of, whereas the cheap 3mm LEDs I bought off eBay have a beam spread similar to the Nicha one and are perfect for night cycling when you have a large cluster of them.
I still have my old 17x 5mm LED bike light so sometime I should really take a photo of the beamspread compared to my 60x 3mm LED bike light in 60 & 18 LED modes.
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