how many lights ?

[cornwood gardens]

:thumbsup: :thumbsup: my grow room is 5ft by 5ft & 7ft tall iv painted the walls mat white
one of my mates said a 125 enviro blue will b ok..
but hes never dun a grow
i ent sure but i think i will need a lot more than that
my other mate got some lights for sale hes got a 400w hid and
a 400w metle halid..
its no good asking my mate whos got the lights for sale
because his grow went tits up,,
so hes throwing the towl in on growing side of it
eny help on this would be nice :thumbsup:

[postmandave]

5ftx5ftx7ft is an area of 25 cubic feet and a volume of 175 cubic feet .A 400 watt would not be suficient for an area of that size that works out at 16 watt per sft..
A 600 watt would be more efficient in a room that size. A 600 watt would give you 24 watts per sqft thats around the minimum wattage per sqft recomended which i think is 25 watts per sqft.The lumens from a 600 watt is around 92000 so that would give you 3680 lumens per sqft. to ventilate a room this size a inlet fan of a min of 60 cfm and and exaust fan of around 100 to110 cfm if carbon filter and duct installed

But better still a 1000 watt would give you better yeilds in an area of that size , i would recomend that you spend the extra cash(if you have it) on upgrading to 1000 watt interchangable ballast .A 1000 watt gives of around 140,000 lumens that would be 40 watts per sqft and 5600 lumens per sqft, this is an exellent light coverage for an area that size but cooling the area might become a problem an inlet fan with a cfm of around 80 should be efficient and an exuast fan of 160 cfm if using a carbon filter should do the trick.

Its all about prefrence really and what you can afford as i said the 400 watt would do if you arent planning on filling this space and only growing a couple of plants but if you plan filling it with plants then you want to do ur homework as if not problems will only arise later in the grow and beleave me and other growers will assure you of this that there is nothing worst that a grow going tits up mid flower because of poor preperatoin. i hope this helped . the postman


ps if you arent buying those lights from your mate give me a shout and i will have them been looking for a 400 watt mh for a project be safe the postman ukgwr

[cornwood gardens]

thanks for the info mate
nice of you to take your time to right all
that chers bud

[cornwood gardens]

you seem to be on the ball (postmandave)
so if i was to get 1000w in ther if all gos to plan
what sort of yeal do you think i should be in for
then mate?

im useing rockwool & clay pebles on flud & drane
guna veg for 6 to seven weeks,,
and im growing (sacra frasca) duch passion
from seed

[Tomthehippie]

Ooooosh! Great bit of info Dave! :D 125w enviro is no way near enuff! :)

[UMrocksmysocks]

yo cornwood. postman knows his shit, take his advice seriously

check ebay for some deals on a 1000w system. you could maybe get a bulb,ballast, and reflector for $300-$400

[xxxhazexxx]

hello mate yeah a 600 would do it but i would use 2 600 super novas in a space that size.how many plants you thinking of?:thumbsup:

[stinkyattic]

what sort of yeal do you think i should be in for
then mate?
Eh, don't worry about yield... worry about survival to harvest! :D
I'm running the same size space for my flower room with a HPS1000. May add a second, or also run my 400 in there. But 1k is plenty to work with.
If you're vegging in that same space, you can go a little smaller on your MH. Just keep your plants clustered close together and the light low. a 400 is fine.
As an aside, if your mate's grow went all to hell (security or crop failure?) make sure you know why, and if it was security, be careful, because you don't want the same fate.
Good luck

[cornwood gardens]

thanks for the info at least its keeping my mind open,,
gess every one got ther own way of doing things
and i gess i got to find my way now !!!
and i will. it might take time but i will get ther trust me,,
thay say the best things come to thows who wait
bin doing quite a bit of reading,
but if you read a book on laying bricks dusant mean you a brick layer
when you have red it.
so iv got to give it a go and just see??

[onequickmove]

one of my mates said a 125 enviro blue will b ok.

always trust your stoner friends; they'll never steer you wrong ;)

[onequickmove]

5ftx5ftx7ft is an area of 25 cubic feet and a volume of 175 cubic feet .A 400 watt would not be suficient for an area of that size that works out at 16 watt per sft..

personally, i think this is a poor way to plan a grow; this sort of calculation doesn't make sense on a number of levels, to greatest being that the lights surely will be lower than the ceiling

the real question is simple and three-fold

1. how much electricity are you willing to use?
2. how much do you want to grow?
3. how well can you ventilate?


also, i'd highly reccommend cloning and having a seperate veg room

[onequickmove]

i'm gonna make another guess and say you have no ventialtion at all? yes? you can't be busting out HID's without serious ventilation

[cornwood gardens]

ther in the green house at the mo..