Just in case anyone else was interested in using this 20W 12V-80V 0.5A "1800LM" (alleged) light on their bike, here is a quite boring video demo of the high, low and terrifying flashing modes of this 1800LM (alleged brightness) bike light I got off ebay for £19.99. It can be bought on Aliexpress for less than half that. If you want one, just search ebay for 20W 80V 18000LM bike light, there are many sellers. If you switch it off and on, you'll cycle through the three modes. There is no switch on the light, but you can connect a suitable motorbike switch, sold separately. The light is wired to my ebike battery via an inline miniblade fuse (3A) and a waterproof motorbike switch on the handlebar. This first video is of my going through high, low and flashing (which I find instantly, highly nauseating) modes over and over again while struggling home uphill on low battery. I'm sure the terrifying flashing mode would cause nearby cars to crash. As you can see, my light is directed down towards the road. What I really like: it makes me very visible to cars, shines a bright and clear light on potholes, and allows me to see where I am going on dark roads. There are a couple of small extra brightish spots within the beam - those are two 1.5W Junstar lights, one on the handlebar, one in the fork. As a cyclist, one can't look too conspicuous IMHO! You're safer seen! This footage is unaltered in terms of brightness or colour, pretty much as-is from the camera, but quality reduced by Youtube, as usual. Mind you, it was terrible quality video anyway. The spread of light appears a little narrower because my awful camera lacks dynamic range, but to the human eye, the beam isn't quite as narrow as it looks. That being said, the beam isn't very wide. The beam doesn't look hexagonal to human eyes. The only thing I don't like, is how hot this light's aluminium casing gets, seems to be damaging the cable sheathing leading out of it. Oh well, if it cracks and splits, I'll replace it with heat resistant cable. On the plus side, the casing could be handy as a handy hand warmer. It's waterproofing hasn't been tested in anger as yet. The clamp is sturdy, secured by hex bolts, but no rubber strip is provided to prevent handlebar scratching. Luckily I had one left over from the other badger collision breakage lol. The light might look a little dimmer in the first video, because I was running very low on battery, and the ebike battery was powering the bike uphill too. Video #2 features high beam throughout. There are better battery powered bike lights available I'm sure, but I hate having to remember to charge umpteen devices before a bike ride... I always forget at least two! This is the new minimum brightness I will accept from a bike light, makes me feel much safer cycling at night. I'll probably keep it switched on during dreary dark winter days. This light is well worth buying at £19.99 or less... if you like this sort of entity and object illuminating object, which drivers haven't objected to yet.
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