600w V 1000w

[Harry Lime]

@Willyweed, the room is an odd shape but the area I want to grow in is about 2.4m x 3.3m
with a bit extra to fit in a res.

@Iffy, I've just taken down a crop. When it's dry I'm emptying the room and doing a total refit - sound proofing the floor, automated watering, new acoustic fans, solid duct and new lights. I plan to document the whole thing coz I'm going to need all the advice I can get!

@ Roll It Large, 60+ watts psf? I'll have to get my calculator out!

 

[speedemon]

that might be because you have your lights too close? 1000w will generally always yield higher

Hey Sifted hope your well my friend,

Yep as I you know I grow in a loft so minimal height, but I do use air cooled shades and temps where kept at 27c using multiple fans, controllers and sensors so heat was never a problem apart from in the summer. Also there was never any light bleaching on the tips of the buds so not too close? When I had a taller space I also used 2 x 1000s and yielded less than 2 x 600 so go figure? Same strains same medium? So maybe your right "generally" but not always. I think with the 600s there is better light spread and less heat, but using the 1000s there is better light penertration through the canopy therefore longer buds forming from lower down.

Edited to add generally most growers running 1000s are also using sealed rooms and c02 to increase yield and works better in higher temps caused by the 1000s. So for me IMHO 600s work best.

Peace

 

[speedemon]

..

 

[siftedunity]

im good man thanks you?
seems odd ive never heard of people getting less with 1000w. I run both and always the 1000s kill the 600. I use air cooled aswell so I can get the 600w closer, but then on the other hand, its dimmer so you need to get it closer anyway I find.
ive never used co2 but I would imagine that would kick ass with the higher wattage.

I treat the 1k differently in that I can cover more floor space and flower up to 12 per one, with a 600w id probs go up to 8 tops.

but yeah I would imagine that its environment that's letting you down somewhere? I have had another room with 2 x 1k, same nutes, same setup/cuttings etc but different location and that yielded half of what im used to and I know that still needs to be dialled in somewhere. mj can be a funny plant.
but I would imagine generally the yield is proportional to wattage in most rooms..
although I remember reading through the cookie thread and some peeps agreed that it yielded better with less light...

 

[willyweed]

600w will give you more choice as there are more of them better spread,have seen pics in a grow bible, 3x6oo work out more efficient than 2x1000 and cheaper to run .the 600 watt bulb gives more lumen's per watt than any other size of hps bulb,i have read this not that long ago and believed it to be true at the time.i do know that lumen's are not the be all and end all of what a light gives, but is a good guide as to what you are getting. mixed spectrum work best for me.that is a big old space though ,will you use air cooled hoods ? day or night?.thanks willyweed

 

[siftedunity]

I don't see how the spread is better because really spread is dependent on the reflector aswell. a brighter light is gonna have a better spread, hps or otherwise surely? plus the 1k penetrates the canopy better.
but tbh you go with what you are happy with. I only use both to keep costs down otherwise id use 1k only.
id say I get about 10 -15oz more from the 1k to the 600w that's a lot more for 400w extra, and using exactly the same floor space.

im not biased because I use both. but I still reckon the 1k leaves the 600w standing..

 

[willyweed]

i know the picture is not great its from the indoor/outdoor medical growers bible 06 the spread is just bigger from the 3x 600 and gives more lumen's per watt than any other the 1000 watt spread is just above . and is clearly smaller.good luck what ever you decide harry .

can you see how the spread is better now siftedunity ? we were not saying the 600 was better per square metre but with that nice juicy overlap covers a better area. the 3x 400 watt gets 30-40% better growing area than the 1000.

 

[Harry Lime]

600w will give you more choice as there are more of them better spread,have seen pics in a grow bible, 3x6oo work out more efficient than 2x1000 and cheaper to run .the 600 watt bulb gives more lumen's per watt than any other size of hps bulb,i have read this not that long ago and believed it to be true at the time.i do know that lumen's are not the be all and end all of what a light gives, but is a good guide as to what you are getting. mixed spectrum work best for me.that is a big old space though ,will you use air cooled hoods ? day or night?.thanks willyweed

I read that stuff in Cervantes book about light cross over/higher lumens per watt with 600s and believe it to be so. Thing is, I wanna reduce my actual grow area to 4 square metres (2 trays @ 2m x 1m), reduce the kit I use, reduce the workload ect ect.
I am gonna try out 1000s, I got the air cooled hoods already so alls I need is four ballasts and bulbs. I'll keep the 600 ballasts and go back to them if I don't like the 1000s.

Now here's a question;- at the moment I have a dedicated extract fan pulling air through a filter in the room and two fans pulling air from outside the room through the air cooled hoods.
What if I lost the dedicated extract fan and pulled air from the room, through filters then the hoods then up the chimney? So air goes - filter - duct - light - duct - outside?
I was thinking 1 fan per pair of 1000w air cooled hoods.

 

[siftedunity]

[URL="https://www.icmag.com/ic/picture.php?albumid=42558&pictureid=1068015&thumb=1"]View Image[/URL]

i know the picture is not great its from the indoor/outdoor medical growers bible 06 the spread is just bigger from the 3x 600 and gives more lumen's per watt than any other the 1000 watt spread is just above . and is clearly smaller.good luck what ever you decide harry .
[URL="https://www.icmag.com/ic/picture.php?albumid=42558&pictureid=1068024&thumb=1"]View Image[/URL]
can you see how the spread is better now siftedunity ? we were not saying the 600 was better per square metre but with that nice juicy overlap covers a better area. the 3x 400 watt gets 30-40% better growing area than the 1000.

tbh if you tried to put 1ks that close to each other you would prob fry the plants where the spread crosses over. in the same space you would place 3x 600w, you would only need 2x 1k.

have you used them? because im talking from experience, rather that what ive read... ive got one room with 2 x 1k if I used 600w in there I would need three so I didn't have dead spots around the edges/corners. etc.

I don't disagree that they put out more lumens per what but the whole spread thing isn't true. the indoor bible is good but out-dated. I mean they say in there you should always take clones from the bottom of the plant but any commercial cloner in the usa for clubs etc will tell you the opposite.

doesn't anyone here try to hit the gpw? because if you are aiming for that, you will see you cant hit as much with a 600w..
jmho..

 

[siftedunity]

I read that stuff in Cervantes book about light cross over/higher lumens per watt with 600s and believe it to be so. Thing is, I wanna reduce my actual grow area to 4 square metres (2 trays @ 2m x 1m), reduce the kit I use, reduce the workload ect ect.
I am gonna try out 1000s, I got the air cooled hoods already so alls I need is four ballasts and bulbs. I'll keep the 600 ballasts and go back to them if I don't like the 1000s.

Now here's a question;- at the moment I have a dedicated extract fan pulling air through a filter in the room and two fans pulling air from outside the room through the air cooled hoods.
What if I lost the dedicated extract fan and pulled air from the room, through filters then the hoods then up the chimney? So air goes - filter - duct - light - duct - outside?
I was thinking 1 fan per pair of 1000w air cooled hoods.

the only problem with that is controlling the heat. with air cooled lights you need to pull the air from the coolest place you can, if the lights are hot, theres no point pulling that warm air back through the lights because it wont cool them as well.
I would personally do it,
pull cool air from outside--ducting and through the hoods--out into the room. then have a filter and exhausting the warmer air out. then it kills two birds with one stone. you cool the hood with outside air which will cool them better, the fresh (warmer) air goes into the room, it will be warmer but you can control that with the fan and filter which is exhausting.

that's what i do, it might not be what you wanna choose but its an idea.

 

[lost in a sea]

they are and the ballast is attached to the back of the fixture so yeah,, and if you have limited headroom you will have to watch temps with any 1000..

Gavita's! Yes Guy, I've been thinking about them for a while. I've read some good stuff about them. Only thing is, heat is an issue in the summer (hence I went to air cooled 600s last year).
Are they as warm as other 1000s?

 

[willyweed]

hey harry i read this too ,https://www.icmag.com/ic/showthread.php?t=112862 .everything you will ever need to know about fans air flow ect. including 1000 watt light probably only need to read the first couple of pages,but it is all there.good luck with the 1000watt lights mate.willyweed

 

[willyweed]

tbh if you tried to put 1ks that close to each other you would prob fry the plants where the spread crosses over. in the same space you would place 3x 600w, you would only need 2x 1k.

have you used them? because im talking from experience, rather that what ive read... ive got one room with 2 x 1k if I used 600w in there I would need three so I didn't have dead spots around the edges/corners. etc.

I don't disagree that they put out more lumens per what but the whole spread thing isn't true. the indoor bible is good but out-dated. I mean they say in there you should always take clones from the bottom of the plant but any commercial cloner in the usa for clubs etc will tell you the opposite.

doesn't anyone here try to hit the gpw? because if you are aiming for that, you will see you cant hit as much with a 600w..
jmho..

hey there, we will not agree on this one,its too subjective ,plants, space , height ,ect.also it was not the indoor bible but the medical growers bible,indoor, outdoor. i only use as a guide.and no i dont grow with 1000w,but some of my grow buddies do when they can control the heat .lol and yes they yield more .but imo not 2/3 more.but on the other hand i may try one of the gavita ones in the future when the prices come down as they get older.goodluck in the future.willyweed

 

[siftedunity]

hey there, we will not agree on this one,its too subjective ,plants, space , height ,ect.also it was not the indoor bible but the medical growers bible,indoor, outdoor. i only use as a guide.and no i dont grow with 1000w,but some of my grow buddies do when they can control the heat .lol and yes they yield more .but imo not 2/3 more.but on the other hand i may try one of the gavita ones in the future when the prices come down as they get older.goodluck in the future.willyweed

yes mate we all have our own preferences. it is subjective, and tbh I think the more faith you have the more successful you will be. I like both for different reasons though. but yield only I like the 1k's.

ive had a mate who swears but 150w hps but has about 10 of them. try them once mate. you might love them...

 

[toppin]

Think i may hang fire with going with 1000w for now just upgraded reflectors in the last 2 weeks of last grow so i want to see how they compare to my old reflectors start to finish plus i did notice a slight temp rise when using them and thats the main reason im not going with 1000w for now as dont know if temp will be a problem over summer yet.

What reflectors are people using to get better result with a 600w over a 1000w??

 

[Harry Lime]

the only problem with that is controlling the heat. with air cooled lights you need to pull the air from the coolest place you can, if the lights are hot, theres no point pulling that warm air back through the lights because it wont cool them as well.
I would personally do it,
pull cool air from outside--ducting and through the hoods--out into the room. then have a filter and exhausting the warmer air out. then it kills two birds with one stone. you cool the hood with outside air which will cool them better, the fresh (warmer) air goes into the room, it will be warmer but you can control that with the fan and filter which is exhausting.

that's what i do, it might not be what you wanna choose but its an idea.

I spose you're right, Sifted. If rooms temp is 75f it probably wont do much cooling when pulled through the hoods.

Willy, thanks for the link. Useful stuff.

 

[siftedunity]

I spose you're right, Sifted. If rooms temp is 75f it probably wont do much cooling when pulled through the hoods.

Willy, thanks for the link. Useful stuff.

exactly mate. even if you pull air from a cooler room that's better. plus obviously fan speed makes a diiference, so I bought a fan speed controller, when the temps are getting to warm I switch the fan up.. then the light cools and doesn't fry the plants...

then if its a cold day, I can turn the fan lower, then the ambient temps under the lamp become warmer which helps. tbh I like all my gadgets so ive got thermostats on my plugs to turn heating on and off at particular temps too.

but yeah. hope that helps..

 

[burns1n209]

so i used to run 4 600w digital, air cooled hood. 2/600w over a 3x6 tray. yield was decent, bud was good, but i wanted to give the 1k a try. It also getting to summer now so i went with 2 1k lights. Just 1 light over each tray, to save a few watts because the a/c is now in action. So i went from 2400w to 2k. Ill report back with the results. I did use the 600w for the first week of flower and it looks like it kept the stretch down, so hopefully with the 1k they will penetrate all the way down and make some big buds.

 

[toppin]

so i used to run 4 600w digital, air cooled hood. 2/600w over a 3x6 tray. yield was decent, bud was good, but i wanted to give the 1k a try. It also getting to summer now so i went with 2 1k lights. Just 1 light over each tray, to save a few watts because the a/c is now in action. So i went from 2400w to 2k. Ill report back with the results. I did use the 600w for the first week of flower and it looks like it kept the stretch down, so hopefully with the 1k they will penetrate all the way down and make some big buds.

Look forward to seeing your results as im in a very similar position

 

[siftedunity]

il post some comparisons up if I get a chance.