Indoor Flourescent lighting

[Night Rider 77]

Hello,

I have this
Agrobrite FLT48 T5 Fluorescent Grow Light System, 4 Foot, 8 Tube

• Includes 8 6400K T5 Tubes
• Up to 40,000 Lumens

How far above the plants do I keep this at?
With my LED's I always used 18" as a minimum

Thanks,
Night Rider '77

 

[G.Leave]

I like tightly stacked nodes on my plants. I run t5's at 5-6" for young seedlings and 2-3" for older plants.

 

[Night Rider 77]

I'll go with that!

Thanks, NR '77