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Sunshinegrower
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Personally I dont think the lumens would nessasarly double...maybe one of our experts can weigh in...if it strait up doubles the lumens thats be worth a try for sure...I have thought about something similar, but my idea was to mix the spectrum and run a Metal Halide in there with a HPS....
I am currently doing a test and running a 1000watt metal halide about 2' away from my hps on one corner oof my grow to see how it compares to just hps's on the other corner...
anyways..just an idea....
So I have been growing for years now and I have learned a lot. Here's my question and has anyone done it before... I'm running the Raptor XXXL 8" ducted hoods with 1k Argosun HPS bulb. My idea is to configure the hood to hold 2 - 1k HPS bulbs in it. One of my main concerns is how close can the bulbs be next to each other, but my idea is to move the current bulb from the center over to one side by 4" or so and then install another the same distance off from center so they would roughly have 8" apart. I would ramp up the air flow on the hoods also to keep everything running cool. I have seen hoods with dual bulbs, but nothing like this before.
Why wouldn't you just use a GrowZilla? It holds two 1000w and says it has 290,000 lumens.
sunshinegrower said:So I have been growing for years now and I have learned a lot. Here's my question and has anyone done it before... I'm running the Raptor XXXL 8" ducted hoods with 1k Argosun HPS bulb. My idea is to configure the hood to hold 2 - 1k HPS bulbs in it. One of my main concerns is how close can the bulbs be next to each other, but my idea is to move the current bulb from the center over to one side by 4" or so and then install another the same distance off from center so they would roughly have 8" apart. I would ramp up the air flow on the hoods also to keep everything running cool. I have seen hoods with dual bulbs, but nothing like this before.
paperplane said:That's what I was gonna say the Growzilla. I have contemplated some of these same thoughts. but wanted to run an HPS & a Blue or superblue. I have also thought about making a custom 5x9 hood with 4 bulbs. Just 1 big hood over a 4x8.
ttystik said:After a certain point is reached, it's more about effectively distributing the light than just making more of it.
Um. Just to quibble.
Certainly not "after a certain point" - placement and distribution is just as, if not more important as firepower.
A garden under a 600w HPS, 6" off a canopy, is going to receive substantially more light than a 1000w 12" over the same garden.
Here - have a read:
http://en.wikipedia.org/wiki/Inverse-square_law
Anyway - to the OP - get your Raptor 6 - 8" off the canopy and you really don't need more firepower than that.
If you want more - you'll need to go vertical.
Um. Just to quibble.
Certainly not "after a certain point" - placement and distribution is just as, if not more important as firepower.
A garden under a 600w HPS, 6" off a canopy, is going to receive substantially more light than a 1000w 12" over the same garden.
Here - have a read:
http://en.wikipedia.org/wiki/Inverse-square_law
ttystikk said:I'm well aware of the inverse square law, and something that I was recently taught by Wazzap (who sounds like he works at Gavita, so I bet he knows his lighting, no?) in another thread recently is that it doesn't begin to apply until distance is 5x the length of the light source.
ttystikk said:Your example was correct- again, to a point. Directly under that light, you're right. However, the 600W light source isn't going to provide that greater intensity to as large a footprint. In fact if it's that close, you're going to get a nasty hotspot and a lot of lanky girls around the edges...
ttystikk said:to say nothing of what happens 12" below a bare 1000W bulb!
ttystikk said:http://www.thcfarmer.com/forums/f9/b...nna-see-32693/
As you can see from this thread, I'm no stranger to the finer points of how lighting works. I'm trying all the cheats in the book, not to mention trying to come up with a few of my own...
DrCandyMan said:my whole room is set up with dual bulb raptor hoods. In fact, in my area its a growing fad to have dual bulb raptor hoods. I dont have any pics on me right now. All u have to do is buy a $10 bracket u have to place the brackets on the inside edge of the 8in duct. 2 1,000 watts fit in all day no prob.
What?
Are you saying that since the filament in a 1000w bulb is some 8" long the inverse square law does not apply until you are 40" from the bulb?
Are you actually saying that?.
What? How many 600's have you actually set up?
You really think you'll get a "nasty hotspot and a lot of lanky girls" if I stuck a 600 in quality reflector and blew 400 CFM through it? Do you think that?
This is really airflow dependent. You could get away with this all day long.
Wait. Wait. I'm - sort of - in shock at this ..
You think there are situations where the Inverse Square Law does not apply - and you think that funny bicycle gadget makes you an expert on light?
Wow ttyystikk. Wow.
my whole room is set up with dual bulb raptor hoods. In fact, in my area its a growing fad to have dual bulb raptor hoods. I dont have any pics on me right now. All u have to do is buy a $10 bracket u have to place the brackets on the inside edge of the 8in duct. 2 1,000 watts fit in all day no prob.
How is the test going for you? I have been doing some research on adding a 2nd bulb to the hoods and I can't find anything that says it will not double the lumens. I have some light meters, but nothing really to do a controlled test. You have got me thinking about adding MH to these. I run magnetic ballast that have a switch to run HPS or MH. So I think I'm going to get an extra hood and set it up for dual bulbs and do a corner run test with 2 HPS. Then towards the end of the flowering switch it out to MH. When would you switch the 2nd bulbs from HPS to MH in the flowering cycle?
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