I got lots of great ideas from this site on running my booth lights from a Deep Cycle Marine battery. Here's the setup that I pulled together.
Charger - Schumacher SC-10030A SpeedCharge Automatic Charger and Maintainer 5 yr warranty
Inverter - Wagan 1000 Watt Continuous Power Inverter Model 2294 1yr warranty
Battery - Everstart MAXX-29. Also a battery box. 18month warranty
From Home Depot
EcoSmart 18-watt LED Flood E* Model # ECS 30 V2 WW FL 120 Internet # 202670523
Store SKU #406027 Equivalent to 90 watt flood 3000 degrees Kelvin 5 year warranty
With this setup I am running 6 lamps in black swing arms from Flourish. I tested this setup and am able run in excess of 10 hrs, actually got to 12 hrs before I shut the system down.
The inverter and charger are much larger than you might need but I wanted something that was robust. Charge time runs 5-8 hours after I have run the battery to the 50% point indicator on the charger. The inverter is much more than needed but I wanted to run it at less than rated capacity to help keep heat down. I put the battery under my ProPanel work table and there isn't a heat issue.
After the first two shows I took a piece of 1x12 pine board, added casters/rope pull and strap the battery to it so that I can pull it in and out of the show for charging in the evening. Left room to put my cooler on it.
It is HEAVY, something like 70# or so and keep that in mind as you are taking it into and out of your vehicle for charging back at the hotel or wherever.