Cooltubes are great if you've got high temps to contend with and do the job for sure.......yep proper hoods put the light down better for sure also..........Dont Mock CoolTubes they rock.......they make the possible.......possible......
Keep an eye on your leaves for colour etc (no burning) i always use a blue lab truncheon.........start with an EC of 1.0 then work your way up in the end times to around2.4/2.6 max.....what I've found half strength normally works all the way through.......doesnt hurt to flush with straight...