Updated 12 Apr 2017

Lezyne

KTV Drive - rear

Bottom line: This USB rechargeable rear light comes in a set with the Hecto 350XL front light. It has poor overall light output. It is extremely easy to fit and remove and extremely easy to use on the bike.

KTV Drive - rear
Consumer score
52
Price

$110

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Test results

Overall score
Just OK
52
Performance
Poor
3.6/10
Steady 0°
Extremely poor
2.0/10
Steady 20°
Just OK
4.5/10
Steady 45°
Just OK
5.0/10
Ease of use
Excellent
9.1/10

Good points

  • Extremely easy to mount to bike
  • Very good mount versatility
  • Extremely easy to use on/off/mode button
  • Battery indicator is easy to see with light turned on
  • Extremely easy to remove and refit light
  • Very easy to charge
  • Passed water testing
  • Has a pulsing mode

But

  • Extremely poor light output at 0°
  • Just OK light output at 20°
  • Just OK light output at 45°

How we test

Overall score:

  • Light performance (70% of overall score)

We measure light output in our lab. Many lights make output claims in lumens, which describe the total amount of light available. However, we think lux (lumens per square metre) is a better measure of light performance. We measure lux at 0°, 20° and 45° to build up a picture of the quantity and quality of light output.

For front lights we calculate light performance combining 40% of the score at 45°, 40% at 20° and 20% at 0°.
For rear lights we calculate light performance combining 20% of the score at 45°, 40% at 20°and 40% at 0°.

  • Ease of use (30% of overall score)

This includes an assessment of “in-use” performance (50% of the ease of use score), which includes turning the light on and off and selecting the mode (with and without gloves), usefulness of the battery indicator, and robustness of the mount to knocks and vibration. Daily convenience (30%) includes removing and refitting the light, charging or changing batteries and carrying it in a bag. Ease of fitting and versatility of the mount adds the final 20%.

  • Water resistance

We left the lights outside for several hours during heavy rain, then thoroughly doused them with a garden sprinkler for a further 2 minutes. We checked they all worked correctly while soaking wet, then towel-dried them and inspected for any water inside the lens and battery compartment or charge port. We don’t include water resistance in our overall score, but we won’t recommend lights that show signs of water ingress.

  • Burn time

We measured burn time of the USB rechargeable lights on their maximum steady setting. If they switched to low-power mode as the battery drained, we recorded the time spent on full and low power.

Full specs

Model

Type
Rear
See or be seen
Be seen
Price
$110
Lit area size
Medium
Lit area quality
somewhat even
Water test pass
Yes
Weight (g)
45.7
Battery or USB
USB

More ease of use test results (/10)

Fitting
9.3
In-use
9.1
Convenience
8.9

Specifications

Batteries or USB
USB
USB type
Male
Charge time (hr:min)
3:00
Burn time to low (hr:min)
n/a
Burn time to off (hr:min)
2:30 (tested)
Shape
block
Bought as a set
In set with
Hecto 350XL

Features

LEDs
2
Steady modes
1
Flash modes
3
Pulse or chase modes
1
Mount to bike
direct
Mount type to bike
multi-fit ladder
Mount type to bracket
n/a
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