Moon bike light review

Moon 2.0 and 3.0 side by side

The Moon Gem 3.0 (£18.49) and Moon Gem 2.0 (£18.17) are two USB chargeable bike lights distributed by Raleigh in the UK. This winter, these are the two bike lights I’ll mostly be using. Let me explain why…

Moon being charged up via USB

The Moon lights are USB chargeable. Now I no longer have to remember to grab a £4 pack of batteries when the low light indicator comes on. I simply plug them in to my laptop. In the long run, this will save a lot of money, as well as bike rides without a light.

Moon attached to the rear

The rear Moon Gem 3.0 bike light is a similar size to the Blackburn Flea. Both have 4 Ultra bright LEDs achieving an adequate light output for cycle commuters. However, it wouldn’t hurt to supplement it with a secondary light. Perhaps the Knog Wearable Boomer or the Fibre Flare.

The Moon Gem 3.0 uses a clever bracket. This makes it very easy to quickly attach and remove the light from your bike. You can also twist the mount upwards. This is a fantastic little design feature as it means you can adjust your light, so it is not pointing downwards.

Moon front bike light

The front Moon Gem 2.0 use a similar mounting system, with a silicone strap that makes mounting quick and easy. The silicone strap and the clip looks like it can take some abuse, and I doubt you could snap it off unless you seriously mishandled it.

On the front bike light you can switch between full brightness and reduced brightness. You can also choose from different flashing modes. I’ve found myself mostly using the full power option. The manufacturer states that you get 19 Lumens of output. In comparison, The Knog Boomer states it has 50 lumens. However, I found the Moon Gem 2.0 to be brighter, which goes to show you can’t necessarily use the lumen figure as an accurate reading. Overall, it provides a decent amount of light for most commutes.

The power button is a little tough to press, and you wouldn’t be able to activate it with a pair of gloves. However, it also means the light is less likely to be accidentally pressed in your pocket or bag.

You don’t get a lot of battery life from the Moon lights, perhaps due to their tiny package. Therefore, every 6-8 rides you’ll need to charge them up again. However, charge time is very quick taking around 2 to 2.5 hours. There’s an indicator for when the battery is fully charged.


Overall, the Moon Gem bike lights are small yet bright, making them a suitable choice for most cycle commuters. Those looking for additional power output should consider something a little more powerful, such as the Knog O Blinder.

Click to take a look at the Moon Gem Front Light Click to take a look at the Moon Gem Rear Light

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10 Responses to Moon bike light review

  1. Yvann 21/09/2012 at 7:54 am #

    I have these Moon lights – have had for about a year now (purchased because I really wanted something USB-chargeable because I was fed up of buying CR2016 batteries) and can’t complain. They are plenty bright for my commute on lit roads, quick to charge, sit securely on the bike and take half a second to put on/take off the bike at either end of the ride. Very happy with them.

  2. SY 21/09/2012 at 9:34 am #

    Same here! Have had them for a year as well. I’m never buying non-USB lights ever again.

    My only gripe with the front Moon gem is that the plastic that holds onto the rubbery bit can crack after a whole year of putting it on and off. Had to do some duct tape sugery …

    Additionally for the front, I also have the 300 Lumen model and it fools most cars into thinking I’m a moped because I only have it on steady. For a 20+ minute ride, I only need to recharge it once a week.

  3. Karl Miley 21/09/2012 at 8:27 pm #

    Agree. Great lights.

    Have been on the look out for some helmet mounted lights for a while but was put off by size.

    Discovered these gems 😉 and now have Gem 2.0 front and rear mounted to my helmet.

    Small enough to be unobtrusive but bright enough to get me noticed.

    Excellent value too.

  4. John Ackers 24/09/2012 at 10:50 am #

    “You don’t get a lot of battery life from the Moon lights, perhaps due to their tiny package. Therefore, every 6-8 rides you’ll need to charge them up again. However, charge time is very quick taking around 2 to 2.5 hours.”

    That is a terrible specification. You are just encouraging manufacturers to build throw away ‘adequate’ lights with next to no battery capacity. 2.5 hours charge time for 6-8 rides (not sure how long that is) also sounds like very slow charging to me.

    It’s surely much better to use slightly larger LED lamps that have proper reflectors built into them and also take hi capacity 2000mAH AA rechargeable batteries (which are sold in supermarkets along with fast chargers) and last for over 100 hours and can be replaced when they start to loose capacity.

  5. Adrian 25/09/2012 at 2:27 am #

    I just checked out the moon comet in hargroves cycles, the front runs at a claimed 100 lumens and the rear at 30, it is usb chargeable and the rear has a saddle mount option.

  6. Johnny 27/09/2012 at 11:49 am #

    Moon make great bike lights. Unfortunately for me I need a high powered light as most of my commute is on unlit narrow roads. The Moon XP500 is certainly worth a look if you need more light to keep safe at night. It’s a bit pricy, but you can find cheaper if you shop around. Also the Moon Shield is a great rear red. Can’t put a price on safety though.

  7. Paul Owens 09/11/2012 at 12:30 am #

    This is the best light I have come across for best bang for your buck.

    I bought this light last week and i have owned the niterider 3000 pro which cost me 500 quid.
    This 3000 lumen power house is unreal and a fraction of the price magicshine MJ-880 and niterider 3000 pro charge. It is is that bright you have to use the dip on it to avoid blinding car drivers on the road. It’s the best deal your going to find anywhere. The battery life lasts a good 3 1/2 hours with the full beam set at 3000 lumens.

  8. Max 09/11/2012 at 5:15 pm #

    Paul Owens – is this just more product pimping? I’ve seen a few posts today on other forums pushing these exact lights (which have since been removed by the mods).

    Very interesting, but it all seems too good and the use of underhand marketing techniques and slating of other products is poor. Perhaps its another SuperstarComponents business in teh making 😉

  9. Nessie 28/04/2015 at 6:30 am #

    Within a few months, the rubber band started to wear and the plastic anchoring the light broke, making the light unmountable. Too bad, because the light itself is a nice little piece of gear. But the strap problem is a deal-breaker.

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