You can get more light by relacing the GU10 halogen bulbs that come with this fixture with similar LEDs, which give more light for less wattage. For example, you could replace the original bulbs with 75-watt equivalent GU10 LED light bulbs that use about 7.5 watts each. That way, you'd be getting much more light but consuming far less energy. LEDs also generate much less heat, another advantage. (Halogen bulbs give off a LOT of heat.)
Until recently, GU10 LEDs were very pricy, but prices have dropped drammatically. Shop around and read reviews because quality and prices vary. Look for LEDs that are dimmable in case they give off too much light. (If you purchase dimmable LEDs, you'll probably need to replace your dimmer because older dimmers don't work well with LEDs.) When shopping for bulbs, remember that this type of bulb varies in light distribution (spotlight or wide angle).
As long as each replacement bulb uses < 50 watts, you'll be fine.
P..S. I have this light fixture in my kitchen and immediately replaced the halogen bulbs with LEDs, which were expensive at the time. (The 3 bulbs cost more than the fixture.) Even so, I still came out ahead because I use this light a lot.