What the distance should be ? 400w MH with cooltube

Hi guys,

What the distance should be from bulb with cooltube ( 400mh) to plants ? Now I keeping bulb about 1.5 inch from plants although the cooltube is quite cool because my fan works well,but I'm not sure about the distance for vegging with 400mh..Thanks in advance.

your nutz move it up

12 to 18 inches

u will bleach the plant .......i know u are thinking it is good ............for the love of god move it back at least 12 inches

Lighting is not especially important during vegg.
Relax... Light up a jay, and don't overthink it. It's
very simple until you get to the last couple weeks.

Okey, my bulb with cooltube is about 12 inch,what about with 600hps ? what

justugh said:

your nutz move it up

12 to 18 inches

u will bleach the plant .......i know u are thinking it is good ............for the love of god move it back at least 12 inches

Click to expand...

Okey,my bulb with cooltube is about 12 inch.What about with 600w hps ? What the distance should be ? 12-18 inch also ?

yes sir

when u get with in 4 inches of the light u are going to bleach the leaves and flowers ............the closest u are allowed to get to it is 8 inches and even then u need to have a fan going to make sure the IR heat is not burning the leaves

12 inches is a about the lowest u want to go so the light works effectively

rem your plant is growing all day getting closer to the light ..........u need to leave room for it to grow up so it not in the danger zone 12 inches ....this will allow u to look in every 2 days and make adjustments as u water the planets .....unless u are a check every day guy but once u do a few plants that stops

Omg,thanks a lot !!! I didn't know that..for flowering I think I'll use a wing reflector with 600w hps, the distance should be 20 inch,right ?

u can be with in 12 inch with that too ...............the 1000w u need 18 inches

600w if i rem correctly is about 90k lumen u are ok at 12 inches ..........it is when u get closer the lumen will increase when u get near 150k that is the

these are old charts of how many lumens the plant gets from what light watt at what distance

u can get as close as they say

but u need a fan in the area blowing cool air tho the leaves .....it has to move so u do not get windburn on the leaves ..........a HPS light is about 70% ir heat light so that close to the plant they need a method of cooling the cells

MH is only like 40% ir heat still need it but not as strong

Oh, thanks for information ! Then I was able to run with a wing reflector from vegging..What's the point keeping a cooltube 12 inch from plants ? if I can use a wing reflector and cover all my plants..

More is not better for babies. Back that thing off to 2ft back, use the MH for veg.

alegro77 said:

Oh, thanks for information ! Then I was able to run with a wing reflector from vegging..What's the point keeping a cooltube 12 inch from plants ? if I can use a wing reflector and cover all my plants..

Click to expand...

what he said

the closer u are to it the more lumen/power u are pushing out to it .........at set lvls it will start to damage the plants those charts i gave u give the set limits for us plant growers

the cooltube main thing is to keep the temp down in the area ..it is removing alot of the heat from the area plus the bulb

IR is a lightwave that makes heat on surfaces ..............the old growers trick is the have your palm touching the plant and back of hand exposed to the light if your hand get uncomfortable with in 30 secs of being there u need to back the light off more

to counter this IR heat on the leaves u need to make a cooling breeze in the area .........this would allow u to be closer to the plants with out them getting heat stress


the whole point of us growing indoors is to mimic the best days of nature and to have as many as we can in arow so the plants do their best for us

Note all those optimal numbers aren't for babies either, those are for plants with well established roots. You want to say lower until those roots are well established. At those optimal levels a babe may not be able to gather water fast enough to survive. Start a bit further back than optimal if roots aren't well established yet.

yah what he said

if u want u can use cfls to start plants ..........i have a t5 just for that reason seedlings untill that first true leaf comes out then would go to a 600w mh now it is going to 600w led

Wow!!

Prince Albert said:

Wow!!

Click to expand...

wow what?

While reading over the recent posts, First words were; wow!!

Prince Albert said:

Lighting is not especially important during vegg.
Relax... Light up a jay, and don't overthink it. It's
very simple until you get to the last couple weeks.

Click to expand...

I have to shake my head at this. Silly stupid IMHO. If you don't try to grow thick strong healthy plants with proper spectrums and intensity during veg, you don't have the foundation for big healthy buds. All aspects of the grow are important to optimal output.

hey man nomofatum

u are photos so u have the time to do the long game i seen root stalks as big as my arm before

if u want some info on the experiments i have run with the feedlines i played with i will be happy to share ........i do autos so getting those roots down in a good soil or to have a good feed plant is one of the first things i needed to learn

i start my buddies plants out for him now he was not getting the same results we figure out it is his light spec it is too red .......he has ones the size of my thumb in 3 gallon bags we are using a mix of bio and chemical feeds to keep them in balance but push them ......he should pull 3 to 4 oz of bud of that strain in those bags

we moved to leds here have a look
http://www.ledzeal.com/p44.html

this is the best light i have found so far with the control it offers from one light and u can daisy chain others in to be off one controller so it all timed together

I can't make out what you mean in at least half of that post. You must be good and high, can you edit it to make it more understandable?