 Welcome to the Crimson Engine. My name is Rubidium. Today we're looking at three different scenarios in which it's probably better to run your lights off batteries than it is to connect them to the main power. Don't get me wrong, mains power is great. It's never going to run out. It's incredibly cheap. It's widely accessible. But sometimes running your lights off batteries is going to give you way more freedom, way more movement, way more control. So today we're going to look at three different times where that's going to be your best option. The first time is any time the light has to move and move a lot. An extra cable is just going to get tangled. It's going to get caught in things. It's going to be too long. Here you see we do a modified poor man's process with a light on top of a C-stand swinging around giving the effect of street lights passing under the car. If you had any kind of cable on this, it's going to get tangled really, really quickly. So I just put this IntelliTek light cannon with a Bebob V-mount mini battery and was able to spin it around manually and not get into any kind of tangles or troubles with cables. The second time is any time you're away from mains power or mains power isn't an option. Here we see another driving shot, but this time shot while driving. I put the Lightcloth LC120 tucked into the sunroof holder. I was able to run that off a battery and able to get pretty decent exposure for a night shot conversation in a car. Now I didn't really finesse this or balance it out or put too much thought into it. I just wanted to show how you can get a big light source quite bright in a moving car by running it off an external battery. This thing will give you over an hour and a half of light. So you could probably shoot all night in a car with just a couple of these. If you use the D-tap on the side, you're able to run additional lights off the same battery and that means you won't have to keep track of different levels at different times. You can just have the one battery sort of acting as your mains power and then run everything else off of that. A third time that it's going to really pay to use lights off batteries is when you're doing what's called a follow fill. That's when someone walks behind camera with a light to fill in the shadows or just give a little bit more illumination on your subject. Here you see one from Black Swan where they're using a lightball on the end of a stick to basically act as the key for Natalie Portman as she's walking through New York City. This was my own version from the dancing video that I shot for Ablesony which I'm going to do a breakdown of on my channel as well in a couple of weeks. And we just used a simple light stick behind camera in order to add illumination to the dancer as we moved around because the camera was so free flowing that we were going to see any light that we put up. And it meant that if we wanted light, which we did, we needed to move it as the camera moved. Running a light off batteries adds an entire new dimension to where you're able to put lights, how you're able to use lights, how you're able to move lights. And I would encourage you in your own workflow to do some experimentation and see where a battery mounted light might help. Thank you very much for watching. There are links to these things in the descriptions. Leave a question in the comments and I will see you next time.