Jet Lites X-51 – 2012 Mtbr Lights Shootout

Lights Lights Shootout Pro Reviews

MTBR Light Meter Measurements:

This light measured 72 lux ont the MTBR Lux setup.   This is excellent output and right in line with its 1000 lumen claims.  But besides the output, the quality of the beam pattern stands out. It is a big and wide beam pattern and it has a center spot that throws a very long way.  The pattern is clean without any artifacts or shadows.

MTBR Actual Lumens and Lumen Hours Measurements:

Mtbr spent several days in a light laboratory facility and utilized ad $30k integrating sphere to measure some lights. The procedure is described in the video below.  This is very revealing as most lights claim a certain ‘Lumen Output’ without actually measuring the actual lumen output.  We are able to measure actual lumen output with this setup and the measurement for the Cateye Nano Shot is 209 lumens at the peak output.

Another excellent data point is the lumen-hour graph below.  It shows exactly how the light behaves over its whole run time.  A flat graph is good as it means the light output is constant over the its run and the user gets the same light outpu in hour one as in minute one of the light.  It also shows how long the actual run time lasts under ‘high’ mode.  The area inside the graph can be described as the total output of the light for one full battery charge.

Light Meter Charts and Comparison Table »


  • Big, bright and very wide beam pattern
  • Excellent materials and construction
  • Solid, adjustable mount
  • Helmet mount is functional and has a breakaway feature in case of a crash
  • Very good battery and charger
  • Company researches, tests and backs up its products


  • Not as cheap as Chinese lights

Bottom Line:

This X51 a great evolution of the A51 from Jet Lites. This one almost doubles the output and it has the flexibility to be used dual mount.  It is produced by a great company so it is a winner all around.

Beam Pattern Photos:

Backyard Beam Pattern Comparison Page »
Trail Beam Pattern Comparison Page »

Value Rating:

4.75 out of 5 Stars

Overall Rating:

5out of 5 Stars

Related Links
Mtbr Lights Shootout Main Page »
2012 Bike Lights Shootout »
Backyard Beam Pattern Comparisons »
Trail Beam Pattern Comparisons »
Light Meter Measurements »
Mtbr Lights Reviews »
Mtbr Lights Forum »

Photo Thumbnails (click to enlarge)

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Wordpress Comments:

  • Danny Taffe (@Packfodder) says:

    I bought one last year (2011 model) directly from Jetlites. Works great, a big upgrade from my prior Niterider Minewt 200. Company was responsive, everything arrived in good order within a week.

  • Lee says:

    “Another excellent data point is the lumen-hour graph below”

    Where is that graph (or a link to it)?

  • Michael says:

    This is a great light and the handlerbar mount is awesome. I ordered direct from Jetlites and everything went smoothly.

  • Ken says:

    This is a great light. Figure in the price and it’s even better. Both the bar and helmet mounts work without any problems. One of the better systems I have used. I use this as a helmet mounted spot in conjunction with a bar mounted 380 lumen flood for a great combination. The low beam is plenty of light for the slow climbs. Press the easy access button on the back of the light and the high beam is perfect for fast single track descents. The round battery is a little odd at first if you plan to frame mount it, but the rubber mount works great. For the helmet mount I throw it in my hydration pack and have no issues. Ordered direct from JetLites on Thursday and was riding with it Saturday night. Great product and company.

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