Cool Tube vs Bare Bulb

Prawn, I was about to buy an 860w CMH. But my buddy that loaned me t5's isn't growing anymore. He is trying to give me his 1000w's. To be paid for later with trading for buds. If I run a strong fan on the floor and an inline fan above 1 1000w. Run that inline fan to vent outside. Should that keep the 1000 cool enough bare bulb? He has cool tubes too. I'd rather not run cool tubes. But if heat is an issue I might.

Shouldn't be a problem. 1000s can get hot, because they produce almost as much heat from one bulb as two 600s, but inline cooling should take care of it. You may need to space your plants a little bit further away from the bulb initially to see how it goes, as there will be a slightly larger concentration of heat from the one bulb (1000), instead of being split over two bulbs (600s), but plenty of vertical growers use 1000s to great success.

If worse comes to worse, you can always try the cool tubes. I don't discourage people from using them, it's just that in my experience - and in my set-up - I don't see a need for them. But I also understand that sometimes people just have to try things for themselves.

I will try this.

Just finished up a run with 18 1k bare bulb vert grow (trees).

I would never ever never ever fucking ever fuck with hoods, fans, ducts, all that shit.

Small desk fan blowing up under each bulb and then the temperature control system of your choice. Lots of AC or big inlet/outlet on temp switch.

WAY cheaper, better light, no fucking dirty glass, no noisy fans, no tins of duct running all over the place and dripping in the winter .

Cons..you can burn yourself on the bulbs. More heat in the room.

legallyflying said:

Just finished up a run with 18 1k bare bulb vert grow (trees).

I would never ever never ever fucking ever fuck with hoods, fans, ducts, all that shit.

Small desk fan blowing up under each bulb and then the temperature control system of your choice. Lots of AC or big inlet/outlet on temp switch.

WAY cheaper, better light, no fucking dirty glass, no noisy fans, no tins of duct running all over the place and dripping in the winter .

Cons..you can burn yourself on the bulbs. More heat in the room.

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Well said and 18 hanging must of been a large space,, what was your grow size & ambient temps outside grow room? Did you run Co2? And Inlet /outlet on temp switch. As in min timerm bc I plan running co2 which higher temps are formidable right so going bare from 72 temos hooded to bare 82 ok right? Im sorry, im in midst of setting up own vert grow and only reason wanted a cool tube /reflector combo is that im vert growing 180degree only in a bath tub so not 360 and having heat exhausted uo through bathroom exhaust vent with a 6 to 4 reducer and I've heard an 8 to 6 reducer with Honeywell grill cut out works well too from RIU Club 315 CMH vert group

F1_Grower said:

Well said and 18 hanging must of been a large space,, what was your grow size & ambient temps outside grow room? Did you run Co2? And Inlet /outlet on temp switch. As in min timerm bc I plan running co2 which higher temps are formidable right so going bare from 72 temos hooded to bare 82 ok right? Im sorry, im in midst of setting up own vert grow and only reason wanted a cool tube /reflector combo is that im vert growing 180degree only in a bath tub so not 360 and having heat exhausted uo through bathroom exhaust vent with a 6 to 4 reducer and I've heard an 8 to 6 reducer with Honeywell grill cut out works well too from RIU Club 315 CMH vert group

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Its comming along, not sure which is better bare bulb vs cool tube
too much mixed specs, but heat 75 to 85 F, RH 50 to 65%

banks dank said:

Imo Cool tubes have a place in closet grows
Or confined areas...a 5x5 closet for example
Would be perfect for 1k cool tube...

Basically small area where heat is a big issue go cool tube.

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I woudnt like to see how much it ll be in my 5x5 tent. I'm running 1000w hps sf4000 and to other little qb 135 watt real wattage plus 3x 42 led neon bar

F1_Grower said:

View attachment 4822786
Its comming along, not sure which is better bare bulb vs cool tube
too much mixed specs, but heat 75 to 85 F, RH 50 to 65%

Click to expand...

The only benefit here is if you can't manage the heat otherwise. A glass tube absorbs a significant percentage of the photons trying to pass through it, and all traces of UV which are able to pass through the bulb are also lost.