I welcome everyone! I present the experience of using an external on-camera RGB light, which has decent characteristics and has extremely thoughtful features that save you during operation.
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The lamp comes in a budget cardboard box with good printing. The front side shows the appearance of the lamp, manufacturer and model (VL49 RGB). The kit consists of a short USB‑C cable, silica gel, the device itself and instructions in Chinese and English.
The device has compact dimensions (65x65x30 mm). The front side is absolutely similar to similar lamps, only the diffuser stands out. On the back side there are controls: a mode selection button, buttons for adjusting the brightness / temperature of the light, a switch, a display, a charging port (Type‑C) and an indicator for choosing a color. Of the additional advantages — a powerful magnet is used on the back side, which can withstand the lamp without any problems.
The weight is almost 100 grams.
When turned on, it meets a bright display with color temperature values (from 2500 to 9000 K in increments of 10 units), brightness level (as a percentage, increment of 1%), and a battery charge indicator. The color temperature and brightness are adjusted using the left and right arrow buttons. The remaining button is responsible for the transition between the normal backlight mode and RGB.
The luminaire uses warm and cold glow LEDs (photos taken at 2500K, 6000K and 9000K)
Using a UNI‑T UT383 light meter, the level of illumination was measured at various brightnesses and colors. The test took place at an illumination level of 26 lux and a distance from the lamp to the luxmeter of 15 cm. Photos of the results are under the spoiler.
- Temperature 2500K, brightness 100%:
- Temperature 4000K, brightness 100%
- Temperature 9000K, brightness 100%:
- At 6000K, a more detailed test was carried out at brightness levels (25, 50, 75, 100%):
Next, similar actions were performed, but in RGB mode with a step of 30 °. Photos were taken in RAW.
- Color index 0°, brightness 100%:
- 30° on color index, 100% brightness:
- 60° on color index, 100% brightness:
- 90° on color index, 100% brightness:
- 120° on color index, 100% brightness:
- 150° on color index, 100% brightness:
- 180° on color index, 100% brightness:
- 210° on color index, 100% brightness:
- 240° on color index, 100% brightness:
- 270° on color index, 100% brightness:
- 300° on color index, 100% brightness:
- 330° on color index, 100% brightness
After unscrewing the 4 bolts located on the back side, the diffuser and the mount that holds it are removed. After removing the diffuser, 20 diodes of cold and warm shades become visible. The LEDs are staggered and there are also 20 RGB LEDs.
When normal (temperature 6000K) and RGB modes are on:
Under the LED panel are the elements shown in the following photos.
As you can see, there is room for another microcontroller and some SMD components. The battery has a declared capacity of 2000mAh.
On the back side, in addition to the buttons and the display, there is a microcontroller (I did not find a datasheet for it), a choke, resistors and mosfet transistors.
The device was left for half an hour at 6000K and 100% brightness. The result is the following:
The front side warmed up significantly, almost up to 50 ° C, the back — up to 43.3 ° C. There is no discomfort during use, the device is very warm, but not burning.
A useful thing that is suitable not only for photo / video shooting (it can be used both for the background and as the main light when using several pieces), but also as a portable flashlight in hard-to-reach places. The device has excellent autonomy (about 2 hours), compact dimensions and shines quite powerfully.