how.high hps

How many inches high for 250w hps dual spec?

I believe you can go as low as 5" as long as your temps allow.

View attachment 2655980And here ya go.

Yeah, you can get them pretty close. If the back of your hand is comfortable under it then the plants will be fine.

View attachment 2656016

but also depend on your ventilation/fan`s and if you have a cool tube/hood or not and of course ambi temperature`s