Im a camper too :)
for example 21w He has a length of 849mm, same as 39w HO...my future growroom should has something like 95x65x130...and i want to use 2 FUji Purple 39w HO; 2 Narwa blue 21w HE; 2 865 21w He in veg....flower: 2 Fuji Purple; 1 of the blue and far red/IF (forgot the name :(); 2...