Royal Queen Northern Lights

Just like the SE-5000 light, I'm having a bit of a issue now either the SE-3000 light, its about 18" above it and at 80% now. Think next go around I'm going to have to make some adjustments to the Co2 levels to try and help correct this light issue. Surprised that when I ran this light In the 3x3 tent that I didn't see any light issues. Almost makes me wonder if it's not something else, maybe a nutrients issue. The humidity and temperature in the room has been ok. Had a few some glitches with the humidity dropping below 40% by just a few percentage. I've also lowered the temperature a bit and we'll do so a bit every week tell harvest to see how it effects the plants. Going to start decreasing my nutrients levels this next week before flush. Well that's all for now. Happy growing everyone!!!