Things to Know About Lighting

ganjagoddess

ganjagoddess

Well-Known Member
VirginHarvester said:
From the grow pics I have seen on this site it looks like these bulbs are always above the plant. As the plant gets taller, especially if you are growing sativas, does the light penetrate through the canopy? Do people add supplemental lighting around the middle and bottom of the plants?

And on another note, is there really a difference between potency of indoor vs outdoor if you use good lighting?
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Mostly No and yes...

Even 1000 watt HPS lights can only penetrate so far into the canopy.

Some do add supplemental lighting but most dont, and its really not needed.

You just your best you can with the setup and it seems to work.

This is also why a lot of growers cut the bottom third off all branches off as they really wont make worth while buds and will just steal energy from the main colas.


As for the potency issue, well the SUN is the best light source in the solar system, and normally using the best/biggest light makes the most potent buds, also Blue light has a lot to do with quality whereas red light has more to do with quality.

Most HPS lights lack sufficient blue spectrums, whereas the sun has a pretty healthy band of blue.

The best Bud I have ever smoked was outdoor produced.

So IMO i would say outdoor buds has a much higher quality than indoor.

But Hydropoincs can create some really good bud as well, and is generally only used inside.

A plant with identical conditions one under a 1000 watt light and one grown outside. my bet is on the outside plant.

Also the Sun has a lot of UV-b, a trigger to trichome production.
 
V

VirginHarvester

Well-Known Member
ganjagoddess said:
As for the potency issue, well the SUN is the best light source in the solar system, and normally using the best/biggest light makes the most potent buds, also Blue light has a lot to do with quality whereas red light has more to do with quality.

Most HPS lights lack sufficient blue spectrums, whereas the sun has a pretty healthy band of blue.

The best Bud I have ever smoked was outdoor produced.

So IMO i would say outdoor buds has a much higher quality than indoor.

But Hydropoincs can create some really good bud as well, and is generally only used inside.

A plant with identical conditions one under a 1000 watt light and one grown outside. my bet is on the outside plant.

Also the Sun has a lot of UV-b, a trigger to trichome production.
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Not meaning to start a debate about which artificial light source is best. But, if some people use 400w HPS, would that be insufficient to produce close to outdoor results? What if you used HPS, and or a mix of sources to make sure you have all the colors and UV spectrums? I've never thought of indoor done well as being inferior to outdoor, at least not significantly.

It sounds like the optimum mix of lighting indoors includes a couple of sources to give all the color spectrums(if that is the right way to say it) plus some source that includes UV- and that all those sources be configured and strong enough to saturate your plants.

Do CFLs blue spectrum for vegging give off UV light?

Thanks.
 
ganjagoddess

ganjagoddess

Well-Known Member
CFL's give off very little UV light.

And as for the 400 watt light, they can be placed closer to the plant than a 1000 so they essentially come with in the same lumen ranger per square foot as 1000's, they just have the ability to cover a smaller distance...

They is a grow journal on here where the effects of UV-B lights were tested.

And yeah alot of high end flowering rooms will always have a MH light as well. MH is a very blue light. usually at a ratio of 1mh-3HPS
 
S

six*113

Active Member
If i had a duelspectrum cfl set up that produced 8400 lumens what would i be working with as far as veg. & flowering?
 
ganjagoddess

ganjagoddess

Well-Known Member
Kinda confusing question you asked there mate...

I mean you could use that light (im assuming it is one lightbulb) for both veg and flower if you have too.
 
G

ganja85

Active Member
Hey Guys I need Some help. I have 600w HPS/MH lights. I was told it cowers 4 by 4 foot area witch is 16sf. But i want to make my grow room 5' by 3' (15sf). How its gona effect my grow? Will it make it better???Worst??? Thanks
 
jimmyspaz

jimmyspaz

Well-Known Member
ganja85 said:
Hey Guys I need Some help. I have 600w HPS/MH lights. I was told it cowers 4 by 4 foot area witch is 16sf. But i want to make my grow room 5' by 3' (15sf). How its gona effect my grow? Will it make it better???Worst??? Thanks
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Use a horizontal reflector, that gives a rectangular light pattern,and it should be good.
 
J

jimbobjim

Active Member
i've just set up my 3'/2' veg room with two 108w fluorescents (the ones about a foot long ) and got them in round reflectors pointing down . just wondering if this is good or not? i know they would be better in a horizontal rather than vertical position but its the only reflectors i could get. The only reason i ask is icalculated my lumens/Sq Ft and it seems very low. 60 * 108 = 6480 *2 =12960 lumens divide that by the size of my grow room and its totally rubbish.
 
powerplant

powerplant

Active Member
hi guys i need some help.
can someone check these lights out Osram HQI-BT 400
tell me if they're good for growing. and how many i might need

another question is that. lets say i have 4, 600watt metal halide lamps. will it do the same work as, lets say 1 HPS lamp??
 
ganjagoddess

ganjagoddess

Well-Known Member
powerplant said:
hi guys i need some help.
can someone check these lights out Osram HQI-BT 400
tell me if they're good for growing. and how many i might need

another question is that. lets say i have 4, 600watt metal halide lamps. will it do the same work as, lets say 1 HPS lamp??
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Those specific light bulbs the osram hqi-bt-400 are not good for growing they have a really high Green Output, and plants do not use green light, they use red and blue, look for normal MH or Normal HPS lamps with a high red or blue spectrum....


Also No a MH and HPS bulb are nearly identical in terms of output light, MH light is more Blue, and HPS light is more red.

1 400 watt MH = 1 400 watt HPS roughly in terms of lumens output...

HPS does put out a slight bit more though.
 
powerplant

powerplant

Active Member
ganjagoddess said:
Those specific light bulbs the osram hqi-bt-400 are not good for growing they have a really high Green Output, and plants do not use green light, they use red and blue, look for normal MH or Normal HPS lamps with a high red or blue spectrum....


Also No a MH and HPS bulb are nearly identical in terms of output light, MH light is more Blue, and HPS light is more red.

1 400 watt MH = 1 400 watt HPS roughly in terms of lumens output...

HPS does put out a slight bit more though.
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so will i get the same results if i only use MH lamps?
 
pppfemguy

pppfemguy

Well-Known Member
powerplant said:
so will i get the same results if i only use MH lamps?
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nope......you could use hps through an entire grow but NOT mh through an entire grow but the ideal lighting is mh for vegging and hps for flowering u will get the best results with that lighting for your grow
 
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