The YN360 II 3200-5500K RGB LED Light Wand from Yongnuo measures 23.4" and allows you to illuminate tight spaces with ease. You can switch between either 360 variable color LEDs or RGB SMD LEDs, enabling either a white light mode or a full color RGB mode for access to a myriad of custom colors. You can make adjustments from distances up to 49' by downloading a free app. You also have the ability to change the beam angle from a wide 110 degrees to a narrow 55 degrees. The YN360 II runs on an internal battery which gives you a runtime of two to four hours.
 
https://www.bhphotovideo.com/c/product/1565983-REG/yongnuo_yn360_ii_3200_5600k_led.html/overview