Gemini Duo – 2013 Mtbr Lights Shootout

Lights

Specifications:

  • Price: $230
  • Claimed Lumens: 1400 Lumens
  • Measured Lumens: 1091 Lumens
  • Measured MTBR Lux: 110 Lux
  • Light Head Weight: 64 grams
  • Installed Weight: 316 grams
  • Run Time: 3 Hours with 4-cell battery in photos
  • Category: High End

2013 Gemini Line Up

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Strengths:

  • Such a small yet bright package
  • Configurable battery options makes for a custom setup for on helmet battery mounting or long run time
  • Excellent craftsmanship with a solid company supporting the product
  • Versatile mount allows it to be mounted on the helmet or bars easily
  • Excellent switch action. Good programmability options
  • Clean optics and consistent beam pattern with no hot spots

Weaknesses:

  • 1091 measured lumens is lower than 1400 lumen claims
  • Looks a lot like the Lupine Piko
  • Green switch light is always on and is quite bright

Mounting:

Mounting is a very simple helmet strap and a rubber band system. The band allows the light to be tilted up and down easily. The helmet mount is on near the front of the helmet so it is pretty low profile and doesn’t stick up so high where it can get caught in low-hanging branches. Because of the band mounting system, it can be mounted on the bars too.

MTBR Light Meter Measurements: Compare all lights here.

This light measured 110 Lux on our ambient light measurement facility.

Integrating Sphere Measured Lumens: Compare all lights here.

1091 measured Lumens. Claimed Lumens by the manufacturer is 1400 Lumens. The Lumen-hour graph below shows how the light performs over the first three minutes of its battery cycle.

Backyard Beam Pattern Photo: Compare all lights here.

We photographed the lights in the same location setting with the same camera settings. The photos were taken in the back yard that is approximately 25 yards long. These photos feature many objects and a distinct background to analyze detail and beam pattern.

Tunnel Beam Pattern Photo: Compare all lights here.

The location is useful since it has walls and a ceiling that can display a bike light beam pattern. The walls have a lot of graffiti on them and actually show detail when they are lit up by a light with a wide angle. Cones and targets are set up with the far target set up at 80 yards.

Gemini Duo – 2013 Mtbr Lights Shootout Gallery
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Gemini Duo Box Contents

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Gemini Duo Box

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Gemini Duo Battery Weight

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Gemini Duo Mounted Weight

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Gemini Duo Head and Strap Weight

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Gemini Duo Head Weight

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Gemini Duo Backyard Beam Pattern

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Gemini Duo Tunnel Beam Pattern

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Gemini Duo - 1400 Claimed Lumens - 1091 Measured Lumens

Related Links
All Mtbr Lights Shootout Articles »
2013 Bike Lights Shootout »
2013 Backyard Beam Pattern Comparisons »
2013 Tunnel Beam Pattern Comparisons »
2013 Mtbr Lux measurements »
2013 Mtbr Lumen Tests »
2012 Bike Lights Shootout »
Mtbr Lights Reviews »
Mtbr Lights Forum »

About the author: Francis Cebedo

The founder of mtbr and roadbikereview, Francis Cebedo believes that every cyclist has a lot to teach and a lot to learn. "Our websites are communal hubs for sharing cycling experiences, trading adventure stories, and passing along product information and opinions." Francis' favorite bike is the last bike he rode, whether it's a dirt jumper, singlespeed, trail bike, lugged commuter or ultralight carbon road steed. Indeed, Francis loves cycling in all its forms and is happiest when infecting others with that same passion. Francis also believes that IPA will save America.


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