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What could be better than the Cateye Volt400 Brompton Light? We think a Cateye AMPP 500, 800 & 1100! The AMPPs are brighter, have better side visibility and have an equally integrated fit on your Brommie.
Yes, we have loved the Volt400 Brompton front light, but at Perennial Cycle we recommend 500 Lumen as the minimum brightness for night riding. 500 Lumen is a good level of brightness for being seen. If you will be relying on the light to shine a path with minimal streetlights, we'd recommend the 800 & 1100 so that you SEE the potholes before you ride through them.
Perennial Cycle is an urban shop in Minneapolis with a lot of commuting cyclists as well as a lot of potholes. This gives us a lot of expertise at setting up lights for cyclists. Our expertise with brackets and unique setups had us thinking we could likely come up with some rechargeable light solutions that would be brighter that the Volt400 Brompton front light, yet be just as clean and unobtrusive a fit to our beloved Brompton Folding Bikes. After setting up a few of these for customers, we decided to make it available for more than our in-house customers.

AMPP500: 500 Lumen: 1.5hrs/high, 250 Lumen: 3hrs/low, 50hrs/flash mode (33mm wide x 25mm tall x 100mm long)
AMPP800: 800 Lumen: 1.5hrs/high, 200 Lumen: 4hrs/low, 30hrs/flash mode (32mm wide x 24mm tall x 102mm long)
AMPP1100: 1100 Lumen: 1.5hrs/high, 400 Lumen: 4.5hrs/low, 50hrs/flash mode (48mm wide x 26mm tall x 135mm long)
The Cateye AMPP lights make a great choice for Brompton Folding Bikes because of their compactness. No worries about interfering with your front bag. Also, all 3 versions have excellent side visibility and offer a variety of light modes. If your daily use is less than 1-1/2 hours you can run on high beam, but if you need to squeeze the most out of the light, blink mode will get you an impressive 30 or 50 hours.
If you are using a Brompton saddle (either width), you should consider the Rapid Mini rear blinky light for Bromptons. It mounts very cleanly onto your saddle. We recommend having this on your bike, no matter what other lights you are using.

While we are huge dynamo lighting fans at Perennial, we understand that it's not always the right choice. USB rechargeable lights are very impressive thanks to advances in battery & LED technology. If your Brompton is going to be used for transportation, whether you are riding in your home turf, or you are traveling, lights are a must for riding at night. And who wants to be limited to riding during daylight hours).

Cateye Volt400 for Brompton
The Volt400 comes with a bracket that positions the light very cleanly above your front wheel. This kit is fully compatible with all Brompton front bags.
While we like this light for it's tidy fit on the bike and it's ability to make sure you are seen in traffic, it's not bright enough for all conditions.
Its biggest shortfall is availability. If we have it in stock and you like it, don't waste time getting it in your hand as it is challenging for Brompton (and us) to keep it in stock.
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Cateye AMPP for Brompton
The AMPP for Brompton fits the light nicely under the front bags and above the front wheel.
The options of 500, 800 or 1100 lumens make this headlight very appealing to anyone needing to increase their visibility as well as spreading a brighter, broader light in front of them. Like the Volt400, the AMPP series is USB rechargeable.
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NightRider Lumina Micro 650
The Micro 650 is a bit larger than the Swift 300, but still a nice tidy package that fits very well on all the Brompton handlebars. A good and strong light with a great beam pattern to keep you comfortable pedaling even on the downhills.
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We have used a wide variety of lights with our Bromptons over the years. We certainly appreciate the Volt400 with its Brompton mount, but we also recognize that while mounting a USB rechargeable light to the handlebar isn't quite as clean, it is equally useful when it comes to shining the road ahead. The Cateye AMPP series is a welcome addition and with it's 3 models, you should be able to match the brightness needed for your riding conditions.

BTW: If you are using a Brompton saddle (either width), you should consider the Rapid Mini rear blinky light for Bromptons. It mounts very cleanly onto your saddle. We recommend having this on your bike, no matter what other lights you are using.

Rapid Mini Saddle Light for Brompton
We recommend the Rapid Mini Saddle light as it is a simple way to make yourself more visible out on the roads (always a good idea).
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