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The Moon Gem 1.0 rechargeable rear bike light is a great ?get me home? light if your main system runs flat or breaks - or as an additional light source. Aside from being extremely compact, the single LED light emits 7 lumen - enough to be seen on roads and cycle paths from behind.
You also get 4 different light modes to play with including full/low beam and flashing - ideal for conserving battery. Other handy features include a low battery indicator, auto charge cut off and water resistant design. A great value safety choice for commuters.
CANDELA The actual amount of light output at the source, similar to volume of sound coming out of a speaker in all directions. One candela = the light intensity of a household candle.
LUMEN The amount of light (light density) that reaches you at a set distance (1 metre) and angle, similar to how loud the sound would appear to you a metre away from the source.
LUX The amount of reflected light from a surface. If you shone a torch at a dark wall, LUX is the light coverage you can see reflected on the surface.
WATT A measurement of power (electricity) rather than a light output. LEDs are measured differently to household, incandescent and florescent bulbs.
What do you NEED to look for?
All lights have a focused beam so it is difficult to compare Lumens and Candelas.
COMMUTING Get the brightest light your budget can afford, with the best features.
OFF ROAD LIGHT A unit with at least 1000 lumens is a good benchmark (500+ is ok but hard to see at faster speeds.
Please note, all size information is provided as a guide - if you're unsure or need any further assistance you can call us on 01792 799508 ... we're happy to help!
What are bike lights?
Bike lights are vital accessories which attach to your handlebars, seatpost, helmet, bag or jersey. Their function is simple – to help you to see and be seen.
Who needs bike lights?
Everyone needs bike lights! It’s a legal requirement to use front and rear lights on your bike between sunset and sunrise, but they are also useful when visibility is poor – in the fog for example.
What are the choices?
Light technology is ever evolving and the choice is enormous. Always think “the brighter the better” and look for a higher lumen output when choosing. There are lights that run on batteries or beams which can be recharged via plug or a handy USB socket (great for topping up at work). Some lights have battery packs and most have a selection of modes to choose from. You’ll definitely need the brightest lights if you ride wooded trails as you’ll really need to see where you’re going!
What should I buy with them?
Spare batteries are handy if your bike runs on these, as is a charger if it’s rechargeable. Spare mounts are always useful, especially if you have more than one bike. A helmet mount points the beam where you’re looking, rather than the direction your bike is pointing.
Don’t get caught out – a spare back up light is a great purchase in case your ride goes on longer than anticipated or the lights go out earlier than expected.
See our Lights guide for more.
We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE to mainland UK, regardless of the size and value.
Please note: bulky products and bikes shipped to outlying UK regions are excluded from free shipping - Click here for more info.
To take the stress out of Christmas you can shop with us until the 21st of December, and although we're not predicting heavy snowfall, we recommend placing your orders before midday for guaranteed Christmas delivery.
Our guaranteed Christmas delivery applies to all products featuring this icon
Please choose your preferred option/size for each product to be sure it qualifies for guaranteed Christmas delivery. If you have any queries regarding our Christmas deliveries or have any questions, then please call our Customer Service team on 01792 799508.
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