Reddit mentions of 5x Battery Box Holder Case for 4 AA Batteries 6V with Wire

Get yourself a piece of something bent. You can go clear polycarbonate or you could go aluminum for pretty cheap. If you go full metal (lol) make your viewport polycarbonate. Then you'll need a box for the lights. These are bright and cheap. Wire them up to a momentary switch so that they're only on when you press the button. If you want a quick burst like Blitz, you'll need a circuit board to control the burst so that it will only be for a second and you'll have to release the button and press it again for another flash. Batteries is the tough part. I'm guessing this could all be accomplished with a simple AA battery pack but that doesn't really sound fun. One of those big 6 volt batteries should power the whole thing. The lights themselves are going to be bright. Building an enclosure for them that reflects light forward would make it even better.

Easy mode is just getting some pre-made floodlights like such.