hps vs hps

Ok the important numbers are par and that hasn't really been touched on yet. PAR shows that actual amount of light being emitted regardless of what wavelengths/colors are being putout.
To max out your space(8x6) you need more wattage no matter what you are doing. But if doing about 20 small/normal plants in a 8x6 the 400's will actually work and definitely out perform your old cfl's no doubt. And if done right be as good as any system.
But you would need Ceramic Metal Halide bulbs. Like 330 phillips allstart. Not just any 400's can compete with the bigger hps.
The reason why is that the 330cmh produces the more PAR than a 600hps...1100umol(HPS) compared to 1400umol(CMH) at 12"
They have a much fuller spectrum and produce more light straight up...and way better usable light at that. If only using regular 400 bulbs then the 600(or bigger) will do better, but get cmh bulbs you'll have more intensity to begin with, and you can spread it while running more of them lower.
Plus they need run on cheap magnetic ballast(and still produce better output) so start up cost are cheaper too.

And you can easily add more if you intend to expand later to max out your space

wyteberrywidow said:

I see what you are saying and either way it will work. I'm just trying to save you the headache now because you will change those 400s out trust me.. first hand experience

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ok i get what you guys are saying.....im still gonna use 1200 watts on my 8x6 all i can afford but i did see last night online that they have these 600watt 42"x13" umbrella lamps that def would spread that light around the 8x6 if i buy 2 of those......only thing that puzzles me is....it doesnt have a hook up for a 6" fan setup..but my grow tents are air conditioned well so heat wont be a problem...so what do guys think about that??? im kinda persuaded to go 2 600's....now im like wich would be better the 24" cooltubes or these what are seeming to be great coverage 42"x13" umbrella setup...keep in mind im buying 2 of them

Get raptor hoods or something to that liking. Givesoff a 4x4 footprint. 2 of those with 2 6's you jamming and guaranteed a elbow and some. Off 1x 600 its very possible to get a pound so get everything dialed and a nice building strain you will be more than happy.

wyteberrywidow said:

Get raptor hoods or something to that liking. Givesoff a 4x4 footprint. 2 of those with 2 6's you jamming and guaranteed a elbow and some. Off 1x 600 its very possible to get a pound so get everything dialed and a nice building strain you will be more than happy.

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now we talkin!!!.....bout to get online and see can i find that cause ive never heard of it.but im guessing they are tad bit better than cool tubes

thank all you guys for great help ... no more indecisiveness.....lol...... 2 600's with 42"x13" vertical umbrella aluminum reflector it is.....im pretty sure it will make those cfls look like doo doo....lol

thowedoff1994 said:

in your own opinion....

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LMFAO not opinion.

Lumens aren't additive. That's a fact.

blacksun said:

LMFAO not opinion.

Lumens aren't additive. That's a fact.

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seems to also be a fact that the 600's would be better....ill see when they get here thats a fact....lmmfao!!

i forgot to ask while on the subject of 600watters ...ive already ordered 2.....one more question about the ballast...i keep hearing people talk about switching the ballast settings..what are they for and how are they used..basically saying does anyone have a lil info on the does and donts of owning and effectively using 600 watt ballast and are they dangerous if so how??

here they are R.I 2 600 WATT HPS/MH....THIS UMBRELLA REFLECTOR IS HUGE....I HAVE A QUESTION THOUGH...IM IN MY 8TH WEEK OF FLOWER ON A 8 OR 9 WEEK STRAIN....SO IF I TAKE MY CFLS DOWN RIGHT NOW AND PUT THE HPS UP ...WILL IT STILL HELP WITH YEILD OR DO I HAVE TO WAIT ON THE NEXT GROW TO GET THE FULL EFFECTS OF MY NEW LIGHTS

anybody have an answer on adding losing my cfls ....putting up 2 600 watt hps during last 2 weeks of flower....will it do the plants any justice?
?

Ok, here is a question for the academics..


If lumens don't add up..


How come virtually every multi bulb fixture in existence uses the lumen rating from the output of multiple bulbs? From commercial to industrial lighting, multi bulb fixtures use additive lumen ratings.


For example, you buy a 4 bulb t-5 and it is a 10,000 lumen fixture, it only has 4 2,500 lumen bulbs. Why isn't it a 2,500 lumen fixture if lumens don't add?


Likewise, would a 55 watt CFL for example, put out 2,500 lumens of light, if it were a single strait line, instead of coiled together increasing the light output?


Thoughts?

If you mean will dropping some extra 'even lower' light in will help, certainly it will. Also would afford you the opportunity to use some 5000k or 6500k bulbs to add a bit of blue in there, which never hurts the greenery.

yea i meant completely taking all of those cfl's down and putting my new hps setup in in the last 2 weeks...could it help with yeild?.....one guy told me if i add that typelight intensity at the end...it would shock my plants ..that confused me...lol

thowedoff1994 said:

yea i meant completely taking all of those cfl's down and putting my new hps setup in in the last 2 weeks...could it help with yeild?.....one guy told me if i add that typelight intensity at the end...it would shock my plants ..that confused me...lol

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Oh, you mean using HPS the last few weeks on a CFL grow.. you'll be fine.. I would maybe introduce it to them from the highest distance you can though at first.. give them a day or two to adjust.. and they will, and they will benefit.. It won't shock them, but you CAN burn them and stress them if you are not careful.. just be careful.

At least that is this cat's thoughts..

333maxwell said:

Oh, you mean using HPS the last few weeks on a CFL grow.. you'll be fine.. I would maybe introduce it to them from the highest distance you can though at first.. give them a day or two to adjust.. and they will, and they will benefit.. It won't shock them, but you CAN burn them and stress them if you are not careful.. just be careful.

At least that is this cat's thoughts..

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ok....im about to start my setup now....but i have about 10 ready to cut down....im trying to figure out where to hang those ten ..my grow room is the only place i have to hang them....and i know they say light degrades thc..i gotta figure out some sorta sheild.....long day ahead of me

im a believer now....2 600's are waaaaay hotter and waaaaaaay brighter than cfl's.......this shit is so bright why would u need side lights....my temps went from 80 to 85....hope thats not a problem

here are pics of my grow .just switched to 2 600 hps ....but this is how far cfls got me.....they have 1 to 3 weeks left of flower..theyve been up 8 weeks today i wonder are the gonna fatten up more..in either case ..for my next grow i dont have to worry about burning my girls constantly believe it or not ...these are nice size buds considering the fact that i used the same cfls for a year and a half before upgrading to hps/mh....so i know the light intensity was weak

if you want to get the bang outta your bulbs, i'd make sure your temps stay between 70-80 day and 60-70 at night. 10degree temp drop being optimal for night time. Don't forget to keep the walls nice and reflective. replace mylar if old/damaged and if it's cleanable it's good to give it a clean with anti-dust cleaner. Also an Intake filter is nice (if not sealed..) because now it will make sure no dust is building up on your bulbs /reflectors/walls. this makes it so you only need to wipe stuff down every 2-4 weeks if done right. If it's a sealed room just get an air purifier. Also the intake filter will stop dust from building on leaves and make it so the leaves can now take in more light!

also date your bulbs and dont handle with your hands, clean with pure alcohol to get any oils off the bulb before firing. if you don't youll notice a black build up at the base of the bulb. this will reduce life and efficiency. You want everything taken care of properly to get the maximum efficiency from all of your equip. Also date the ballast! the old ones go bad and will give off Carbon monoxide which is very bad for you

I have to straight up apologize for my earlier posts.

Not only was I wrong about lumens being additive

https://www.rollitup.org/indoor-growing/83128-lumens-lux-adding-all-up.html

^ sticky from the indoor growing forum

I was being a complete jackass at the same time.

Lumens/lux ARE additive where the light sources are close enough together that their projected beams of light overlap.

In a four bulb fluorescent setup where each bulb is 2500 lumens, as max mentioned earlier, only a small portion of the area lit up below directly in the middle of all four bulbs would get the full 10,000 lumens, but yes it is still definitely additive.

Anyways, my bad yo!