Not taking cost into consideration, the ideal way to buy the best LED on the planet earth. Not Mars.............................hydro. Etc. Etc etc.OK - I'll jump in - I'm in Canada, grow tents are kept no higher than 50% RH and the house they are in is set for 50% RH with a real serious dehumidifier. I've never had to nor do I use a humidifier. My 5x5 has the new G8-C3 LED and my 3x3 the old blurple G8-450 vedge/flower + UFO red light. So, yah, I'm a G8 fan but I definitely scouted out the better LEDs on the market before deciding on the C3. It's a pretty awesome unit in every way - perfect for a 5x5 without CO2. I looked at the Diablo 650, HLG, Gavita, and more...the only item I didn't take into consideration was cost. Very happy with it - on my first run, finishing off vedge right now.