You can defiantly pull that with not too much more than your already got. I don't think another major light is needed.
Cree household bulbs positions around would be a great addition and make the most of what you got. Maybe 4-6 bulbs...about 45-60 extra watts to your current setup. That would be about ~180w to pull 112g. A few more watts won't hurt the chances...figure anywhere from 0.5-1.2g/w based on grower abilities, strain, light brand, ext for LED growing.