GVB Gear GVBPL12 On Camera LED light ala Aputure M9

Vitaliy_Kiselev

5600K Color Temperature
120° Beam Angle
High CRI
Internal 2500mAh Battery
2-Hour Run-Time on Full Charge
Dimmable
Magnetic Attached Diffusion Included
CTO Gel Included
https://www.bhphotovideo.com/c/product/1361842-REG/gvb_gear_gvbmstl9_stl_9_pocket_sized_daylight_on_camera.html

Vitaliy_Kiselev

Measurements coming soon.

Sph1nxster

Any EU places to buy yet?

Vitaliy_Kiselev

@Sph1nxster

This one do not know, sorry. They do not have dealer as it seems.

Vitaliy_Kiselev

We'll do more measurements, but for now controller behavior looks little strange.

Like M9 it can't keep up output, but it also have sudden jumps.

Vitaliy_Kiselev

GVB Gear GVBPL12 (Daylight model), Measurement using CV600, Russian Lab processing

We cover spectrum, color temperature, and all modern color quality standards, including latest 2016 and 2017 years ones.

Never select light based on just CRI number.

Focus on TM30 and CIE 224 and look for color distortion and Rf values.

GVB Gear GVBPL12 is quite good light with light quality suitable for videos.
Light tends to be slightly cooler than 5500K.

Color temperature

CRI color quality

CQS color quality

TLCI 2012

TM30 color quality

TM30 details

All TM30 color samples Rf values

CIE 224 2017

Vitaliy_Kiselev

More complete brightness during discharge, it is much brighter than Aputure M9

But same approach used by controller - more life but with cost of falling brightness.

Compare to M9

Better brightness due to more and larger leds used

Vitaliy_Kiselev

GVB PL12 PWM at 100% (battery at not full fresh charge)

You can see that controller dims leds even at 100%.

See above that controller can't keep output level.

PWM Frequency is 43,45Khz

GVB PL12 PWM at around 25% (battery at not full fresh charge)

Vitaliy_Kiselev

GVB PL12 Inside

Light has simple and cheap design, but better than Aputure M9.

Wheel used here is much more handy for adjustments and will live longer.
Front led board has large vertical holes for inside ventilation.

Battery and strange empty space inside

manufacturer decided to put empty space with some little vent holes.
It is not much efficient and take lot of space from battery that could be larger.

Main board

Soldering is not top notch here. Plus board is unnecessary crowded.
Lot of space is left between board and battery to make proper design and to not have battery wires solder points so densely placed.

Vitaliy_Kiselev

GVB PL12 Thermals

Looks not bad, hottest place is inside main controller board.

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