Oh, nice! I see a lot of people trying to use a few little 13W CFL's, and they wonder why their plants are tiny, spindly, or give them 4g, but 200W of CFL is doable. I've seen decent success with 6 x 42W CFL's, and of course it was better after adding 100W from LED's.
More light is always better, of course, so I'd consider adding light. You could certainly do worse than what you've got, so if you have the budget to add light, do it, and maybe keep what you've got going on if you have the space. 300W of more light (or probably less than that if the light you are looking at is "300W" rather than 300 actual watts) won't kill you when the power bill comes. No light runs on air, but your current 204W plus 300W (or 132W, more likely) is probably of little concern. TacoMac did the math and showed his work up there in post #3, so he gets full credit, and I'll reiterate that you can expect to add about 5 bucks to your power bill, maybe $10, tops. And you'll like the results.
Switching to a 400W HPS rather than adding the LED is something a lot of people would probably recommend here, as it would get you a LOT more usable light for a similar monthly cost, but that would come with its own set of concerns, heat management being one. Personally, I'm only interested in COB LED now, but I acknowledge that any technology that gets you enough light can produce some good herb.
