It might work, but I don't have any data on Odyssea 2 bulb T5HO lights, so I can't be sure. Most likely it will be too much light for that tank, for a low light tank. If you were to figure out a good way to hang it above the tank you could always make it work.
Many of us have no top on our tanks, with the water exposed to the air. The two disadvantages are faster evaporation of water and fish jumping out. Both are manageable problems. One of the major advantages is the ease of reaching into the tank to pick up dead leaves and other debris, or do minor pruning.