Remarkably potent secondary/contingency light but requires frequent recharging, especially if used in higher settings

The Moon Crescent front LED light continues the marque's tradition for innovative, durable and eye-catching systems. Fifty lumens hardly sounds like phenomenal firepower but the Crescent kicks many of today's similarly priced commuter torches firmly into touch.

Inside the low profile (70x19.5x12.4mm) lozenge-shaped casing lie ten super bright LEDs no bigger than a pin prick fed by a USB charging lithium polymer battery. Despite weighing a barely-there 23g, the plastics and lens seem very hardy. They have survived ejection from jersey pockets and similar brushes with terra firma unscathed.

Charge ports are always vulnerable to moisture but the Crescent is blessed with a deeply recessed rubberised plug, which seems better designed than most. Ours has withstood trail spatter, heavy rain and repeated provocation from the garden hose.

Inboard sits a similarly tactile switch, easily commanded wearing stodgy winter gloves but just firm enough to prevent unwanted engagements in pockets or luggage. That said, it's worth familiarising oneself with the mode sequence before setting out.

Two quick but definite presses put it in standard mode, a steady 10 lumens. Subsequent prods unleash 20 and overdrive respectively. The flashing mode proved a little elusive to start with but comes on stream in exactly the same fashion. Vertical mounting saves a bundle of handlebar real estate and is easiest to command, although peripheral bleed can be a little rough on the old mince pies in faster flashing modes.

Moon employ a watch-strap mount, which contrary to suggestion, isn't universally compatible with Cat-Eye but seems more accommodating of oversized diameters than most and can be cajoled around a head tube.

Initial impressions were that 50 lumens must've been a misprint. The searing white arc of overdrive mode is more than adequate for map reading or roadside mechanicals and almost overkill for scooting around town. The Crescent's peripheral presence knocks its 110 lumen Comet cousin into a cocked hat, which made roundabouts less traumatic at rush hour.

Accurate run times and nagging battery indicator limit unexpected shutdowns to rider complacency and we've discovered several leading brands of smartphone charger work fine in a pinch. Flashing/strobe cycles are hardly shrinking violets and do so at a unique pace, thus remain distinctly conspicuous against competing illuminations and excellent dynamo companions.

Shop around on line and you'll find it currently being substantially discounted, making it worth bagging a couple now for next winter.


Remarkably potent secondary/contingency light but requires frequent recharging, especially if used in higher settings.

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road.cc test report

Make and model: Moon Crescent front light

Size tested: Black

Tell us what the product is for, and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?

Moon clearly feel this is self explanatory but in my book, the crescent is a clever little contingency/secondary light with phenomenal punch.

Tell us some more about the technical aspects of the product?

* 10 chips high brightness white Led

* Rechargeable lithium polymer battery (3.7V 300mAh)

* 6 modes : Standard / High / Over drive / 50% Flashing /100% Flashing /Strobe

* Quick release rubber strap handle bar/seatpost mount (fits 22-31.8mm)

* Low battery, charging and fully charged indicator

* USB rechargeable

* Automatic fully charged cut-off system

* Side visibility

* Water resistant

* Size:70 x 19.5 x 12.4mm

Rate the product for quality of construction:
Rate the product for performance:

Visible to around 270 metres on unlit roads in flashing modes, we've returned 1hr 23 mins in overdrive (compared with claimed 1hr 30); 2hrs 51 in high (3hrs), 50% flash 5hrs 56 50% (6hrs) 100% flash achieved 2hrs 54 (3hrs) whereas standard and strobe managed 5hrs 12 (5hr 20) and 4hrs 14 (4hrs 20) respectively.

Rate the product for durability:
Rate the product for weight, if applicable:
Rate the product for comfort, if applicable:
Rate the product for value:

Tell us how the product performed overall when used for its designed purpose

Overall, I've been seriously impressed by the Crescent's power to size ratio, high build quality and distinctive strobe sequences. However, battery stamina limits the appeal to contingency use, or moderate commutes/training when run in conjunction with a dynamo

Tell us what you particularly liked about the product

Remarkable output relative to it's size, distinctive strobe patterns and decent build quality.

Tell us what you particularly disliked about the product

Battery quickly exhausted in the highest settings.

Did you enjoy using the product? Yes.

Would you consider buying the product? Yes.

Would you recommend the product to a friend? Yes, for commuting/training or contingencies.

Overall rating: 7/10

About the tester

Age: 40  Height: 1m 81  Weight: 70 kilos

I usually ride: Rough Stuff Tourer Based around 4130 Univega mtb Frameset  My best bike is: 1955 Holdsworth Road Path and several others including cross & traditional road

I've been riding for: Over 20 years  I ride: Most days  I would class myself as: Experienced

I regularly do the following types of riding: cyclo cross, commuting, touring, fixed/singlespeed, mtb,


Shaun Audane is a freelance writer/product tester with over twenty-eight years riding experience, the last twelve (120,000 miles) spent putting bikes and kit through their paces for a variety of publications. Previous generations of his family worked at manufacturing's sharp end, thus Shaun can weld, has a sound understanding of frame building practice and a preference for steel or titanium framesets.
Citing Richard Ballantine and an Au pair as his earliest cycling influences, he is presently writing a cycling book with particular focus upon women, families and disabled audiences (Having been a registered care manager and coached children at Herne Hill Velodrome in earlier careers)


markwill [21 posts] 5 years ago

used the rear light of these and am very impressed with how bright and small they are.