What flashlight is better for SLR cameras to shoot video in dark light?

Soft board is easy to handle, just get a piece of white silk.

The intensity of that headlight is similar to the high beam in front of the car, so it must be concentrated to ensure the projection distance, and its color temperature is higher than that of ordinary incandescent lamps, and the color temperature and intensity of strong flashlight are not up to standard. However, the color temperature can be solved by the white balance of digital camera, and the key is intensity.

If you really want to save money, I'll give you a do-it-yourself suggestion. Buy a few single-headed or double-headed Yuba lamps, connect a power plug switch by yourself, and then make several gathered (small in front and large in back) or straight tube lampshades with cans. When shooting, stick the lampshade with the corresponding shape on the Yuba bulb as needed (no gap is left at the bottom), find someone to help you hold the lamp board, or find a place to fix it, and be sure to prevent fire. Yuba lamp has high power, and the gathered light can project a certain distance.

Besides, when you look at people shooting at night, it depends on what you are shooting. If you are taking a close-up view, you can use the headlights you said. If you are photographing people, this light intensity is not appropriate, because people can move, so it is appropriate to use the Hou Lian synchronization function of the flash. And if you want to see farther, no matter how strong the illumination (military air defense searchlights may be combined into one), it is difficult to meet the requirements.

Also, you said you wanted to buy a lamp. From the point of view of photography, single lamp lighting is not suitable for all shooting, so it is better to prepare more lamps.

It is suggested to accumulate more theoretical knowledge first, and then you can naturally come up with some reasonable ideas after you understand the truth.