Have a look at the Hydroponics Hut website. They have a Pro-grow 400 too. It would be more than enough for your tent, maybe too much.

Here is the link: Pro-grow 400

Although the LED light I use has a footprint of 2.4sqm, your tent has an area of 2.25sqm. So perhaps the LED light I have can handle it. The website says so. All the details are stated.

There is also videos and documented grows of the light in action. They really do work and you get a 3 year warranty... how bad.

Personally, I would go with the Pro-Grow 400 for that size tent. It doesn't use too much power either. I'm sure you will have a return in your first grow.