You just proved to me that one can actually take a plant that far into veg lol. Not making fun, it's actually very interesting how amazing she looks considering. Nice work.
What wattage do I recommend? Depends... Is it just this one plant or several? Are you growing her/them in a grow tent/grow room? How big and tall is the grow space? Any idea what's the combined wattage of the lights you're using on her/them now?
If you don't have any types of lights with reds in them such as HPS, LED's, T5's or the such, it would be a good idea to try to find and use them. If you're on a tight budget (like I was back in the day) and getting a costly light fixture just isn't happening, then I can only suggest to try to add more of the bulbs you're currently using or find some a bit more intense? You're also going to need a good fan to keep all that heat away from the plants.