Yongnuo YN600L Pro LED Video Light/LED Studio Light with 5500K Color Temperature and Adjustable Brightness for The SLR Cameras Camcorders.

Purchased the unit after detailed study. This light fits perfectly into a backpack along with the rest of my gear. I love the fact that the light output while using the power adapter is the same as what you get while using 2 batteries. I selected the model without the colour balance dial. Each of the batteries powers alternating lines of LEDs, so if you need full power, use 2 batteries. You cannot charge the batteries on the unit, so you will need to purchase a charger. Like most of the reviews say, the barn doors cast rather ugly shadows, so all they do is protect the LEDs in transit. I have not noticed any flickering or colour casts. The fan does kick in after a while of use, but the sound has not been loud enough to be captured by my field recorder. I just wish that the light came with a system to hold a diffuser umbrella.