The Bare Bulb (known as the J lamp in the country) is a flash lamp that exposes the lamp to the outside. The volume is similar to that of a typical hot shoe lamp, but it has a light quality close to the studio lamp. Therefore, it is subject to many foreign photography. The teacher's favor.
Better light, better heat dissipation, very portable
In the picture below, the hot shoe light is on the left and the bare tube flash is on the right (picture from Duomeang)
It is easy to see that the light emitted by ordinary hot shoe lights has only one direction, while the naked-tube type J lamp emits light in all directions, so the light in the softboxes such as softboxes is more even and light. Better quality.
Due to the design of the bare tube, the naked tube type flash has excellent heat dissipation performance, and it will not be overheated even if it is flashed for several dozen times.
Grass experience
Two years ago I was no longer content with the 430EX II
The low power, began to search for more powerful flash, the high price of the studio lamp (the author's student party at the time) and the large size did not meet my single soldier combat situation, followed by the single lamp of American photographer Zack Arias. "Photography tutorial" found a SUNPAK 120J, its high power and ultra-portable characteristics won my heart, they searched the richest family and found that Sunpak's flash mostly used or sold the body had to give up. In the back of each flashing light forum, he discovered that a big god took Yonyo's YN560II flasher DIY into J light, and he also opened a shop on the richest man's home, decisively ordered a YN560 II to 190J (190J). It seems that the output power is 190ws, and the general output power of the hot shoe is 60ws, so the power of the 190J is more than three times that of the 430EX II. I still don't remember the concept for it now.)
J Light Deity and Accessories
In view of the flash lamp has been used for quite some time, several small scratches have been produced when shooting.
Because the lamp head has been modified, the center of gravity of the lamp has been moved up to the lamp base. The J lamp is no longer suitable for use on hot or cold boots. Therefore, I bought the stent of Shennong to support the weight of the J lamp.
Naked light flash effect 
With standard cover flash effect
Practical experience
Using a single light to help take a photo studio in the evening, use the J lamp and a large piece of soft cloth to imitate the effect of sunlight into the room.
Equipment list:
1x 560II change J lamp
1x PB860 Flash Power Box
2x YN622C Flash Unit
1x God cattle bracket
1x Air Clamp
1x 2x3 meter soft cloth
1x 2x3m black background (for black flag)
experience feelings
The modified 560 combines power and portability. The high power allows me to shoot at low ISO. The easy-to-cool tube design and the flash power box allow me to “bring†continuous shots and hot shoes at high speed. The general size of the lamp allows me to easily tuck into the camera bag. With the flash power box can complete the intensity of the shooting (1/4 or 1/8 output, flash 200 + times), the only downside is that the self-modification of the flashing light has lost the warranty, and the power to change is also let me There are some concerns about the safety during use. But for only 1,000 yuan in outdoor lighting, but also a bicycle?