What could be a problem with using an LED as a continuous light setup is always to ensure that the battery is charged.
By the end of the summer this problem got a simple and smooth solution! A docking station for the ELB 1200 was released. When I use the LED or having long photo sessions, I can unplug the battery and plug the unit onto the Dock connected to the mains.
Now I'm ready to shoot endlessly like with any studio flash system.
This easy solution allows me to take care of charging the battery while I work in the studio and always be ready to go on assignments if needed.
The result is that now I'm using my ELB 1200 system in the studio just like a power pack on mains. Both as an extra flash and with the LED to most of my photos of newborns.
And the best thing is that now, my little models sleep like babies!