Actually I read a couple articles from some folks that tested 600s over 1000s and discovered that stsggered 600s at a slightly lower level (being possible with enclosed lights) saved power and the light levels were right on part with the 1000s and due to the staggered design much more effecient in light intensity and eliminated hot spots and so on. I just put this up because I find it interesting and doable. No I don't have money to blow. But I am building a bigger indoor permanent grow with flower room veg room and a drying processing room, all legal medical facilities. So I am just exploring all avenues. :)
I'm not a room designer by any means, but I've run quite a few lights, in quite a few setups.
I think you are skipping a step in the process...
Use the same hoods, same staggering & you should get proportionate readings if you use a 1k. A 1k is simply more output than a 600, usually by about 500 watts depending on the ballast. But with more output, comes more heat.
So a 1k is often running closer to 1100w, just shy of double the wattage of a 600. There
IS such a thing as too much light, but not at the level you are talking about. At this level, the thing you need to worry about is heat. If you can handle the heat (& expenses included in managing it)(plus the $ for electric) You want as much light as possible.
But more light = more heat. At this level, you want all the light you can get, what you have to figure out is how much heat you can deal with.
You don't need help picking the light per se...you need help figuring out how much heat your room can handle. Do you have the details of the room? Dimensions, location (basement vs 2nd floor), ambient temp/rh, intake/exhaust set up. What is your outdoor environment like throughout the year? E.g. I live in New England, so we have cold winters, fairly hot/humid summers. But on the whole, it's unpredictable. So in the winter, I could run glassless (no glass = better in my opinion) pump in air from outside & run 1k's. In the summer, it's very hard to manage temps with a 1k glassless. So the glass goes back in & the bulbs get cooled & hot air pushed outside.
I'm not sure if I'm making sense, it's a heavy brain fog day. But if you want to grow good meds, you have to remain in the right temperature ranges. This is what you should be trying to figure out. The more light the better. I'm currently flowering at 100w per ft2 & the plants are loving it. The "too much light" threshold is pretty high, & under that, you want as much light as you can run.
So, you pick your light based on what you can handle thermally. We can help you figure that out with some of the details I asked above.
