That's only my opinion toasted. I've even seen some say 600w. My smallest light is 300w from the wall. Not an auto guy but tried out 5 in a 2x4 tent w/ that light & was surprised & happy w/ result...both how the light performed & how well the autos turned out. Your plants look very good so see how they turn out....maybe smaller bud size w/ that wattage but even small buds can be dank. To save $ there may be refurbished units from some mfrs. or used lights in the marketplace now that LEDs are more mainstream & flooding the market. A few posts earlier...some talk about 1 big vs 2 smaller. 2 smaller often better coverage depending on light. Some interesting new lights available in the 150w range.
There are organic snobs out there but I'm not one of them. Good herb can be grow w/ synthetics or organically. Yields larger & even faster w/ synthetics. Organic taste, fragrances, smooth intake are special. Synthetics rely on chelating agents for uptake. Not the healthiest stuff. Organics rely on microbes or natural chelation agents. Mixing isn't terrible but synthetics will kill off some of microbe population & require ongoing inoculation. If interested start reading, learning & gradually move in an organic direction. At some point you will likely say, "Hell I think I like this approach" & just dive in completely. Organics is not recipe driven....can be quite creative in what you use & when.