I doubt seriously that it's a pure sine wave inverter - which is what you need to power your lights outside when you are away from a traditional power source.
Check out
Welcome to Innovatronix Incorporated's Web Site for an inverter that works with most lights. Fast shipping and pretty lightweight. Hard to beat the price, too!
Here's a review of the Explorer 1200 from Innovatronic:
Rob Galbraith DPI: Tronix Explorer 1200 delivers on its promise of bargain performance
Bob S.