I would still suggest you to LST it ..




fist 4 pics is under a 6 tube T5HO fixture (294W/29,700 Lumens) 2x2700K and 4x6500K
last pics is under a 600W HPS tho ..
weed is a light loveing plant .. and need atlest 3000 Lumens per sq, ft, doing Veg. and +5000 .... 10,000 is more like it doing flowering ..
on a clear day the sun provide around 10,000 Lumens per sq. ft.
my fixture provide around 5000-12,000 Lumens per sq ft. 10-2 inch`s away .. according to my sun meter ..
so with CLFs and Tubes its all about keeping the plant low .. bushy and even ...
and keep the light close .. as the real down side of them lights is penetrations ..
View attachment 2289582
and do make a hood of some kind (no carbord please .. not even with CLFs) as you kind a loos half your light with out one ..
alu tape will work great .. alu is one of the most refletiv meterials .. I use it myself .. boath in my grow room and at work when I weld in alu or stainless steel
tho .. dont try to make it to smoot or strait .. we dont want any hot spots .. actualy if you use sumthing that curve a littel it would be perfect (like the new moon etc.) a pice of masonite or thin plywood can work ..
and if you have a small table fan let it blow near the plant (not directly at it constently) to creat some wind ..
will boath strengen the steam and help remove old air/co2 and provide fresh ..