quick question on lighting and lumes

hi, just wondering if any1 could help?? iv just made a stealth grow room that is a square foot in size, would i be able 2 use a 20watt cfl that gives off 1200 lumes to grow as 1000 lumes per square foot is what people aim for 2 grow. only thing is i dont know if its got a red spectrum for flowering.

3,000 lumens per sq ft - sufficent light per sq ft

but 3 of them/./././.
what ya growin~??
good luck

paul-mc said:

hi, just wondering if any1 could help?? iv just made a stealth grow room that is a square foot in size, would i be able 2 use a 20watt cfl that gives off 1200 lumes to grow as 1000 lumes per square foot is what people aim for 2 grow. only thing is i dont know if its got a red spectrum for flowering.

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What is the spectrum of the bulbs? Get a 23watt 5000k bulb and a 40watt 2700k bulb and you will be set. Worry more about watts than lumens.

NO worry bout lumens not watt's!!!!!!!!!

watts are how much electricity energy the bulb uses....
lumens are the ammount of light the plant recieves........

get 3 lights to have over 3,000 lumens per sq ft

caliboy80 said:

NO worry bout lumens not watt's!!!!!!!!!

watts are how much electricity energy the bulb uses....
lumens are the ammount of light the plant recieves........

get 3 lights to have over 3,000 lumens per sq ft

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No, lumens are not what the plant receives, they receive nanometers(spectrum), watts is the power and energy pushing the spectrum. Lumens is just a visual reference point for humans not plants, it does not any way indicate what and how powerful the light is. If anything worry about PAR and forget lumens totally.

rkm said:

No, lumens are not what the plant receives, they receive nanometers(spectrum), watts is the power and energy pushing the spectrum. Lumens is just a visual reference point for humans not plants, it does not any way indicate what and how powerful the light is. If anything worry about PAR and forget lumens totally.

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sorry swim dont get this,, but so if iswim aiming for a high yield and dense buds, what to use, idea that HID were efficient cause the lumen output, so if swims gowring with cfl what should swim use,¿? can you get the same result with cfl that hps with the same wattage?¿?? that would be if the lumen don't count

kyaz1111 said:

sorry swim dont get this,, but so if iswim aiming for a high yield and dense buds, what to use, idea that HID were efficient cause the lumen output, so if swims gowring with cfl what should swim use,¿? can you get the same result with cfl that hps with the same wattage?¿?? that would be if the lumen don't count

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If the spectrum needs were properly covered, I think it could be very possible to achieve the same results of equal wattage.

Here is some reading material: Light and Plants

Watts is the energy output. This measures power or how much energy the lamp will use.

Lumens are measured by candlelight so for each lumen is a candle which is actually close to the output of the sun. Lumens are very important.

Spectrum is the color output. This is also important because according to studies the colors that are close to 6000K are daylight and 3000 are bloom/or reddish fall light - these two are needed the most for plant growth. Although the sun outputs almost every single spectrum of light.

I feel as though they all add up because you want the most lumens for the watts and the best spectrum. Intensity is good but it can be achieved by bringing the plants closer to the light.

CFL's are by far the most economical eletrical light source and they do have a great source of lumens with low wattage.

Stop it! Just fuckin' stop it!! You people crack me up - this is really funny!!! Who's on first? You're all on the right track, but you're going around in circles - biting each other on the ass!

Watts are input, electric power to the bulb.

Lumens are output, light energy from the bulb.

Spectrum is a "measurement" of the light that determines what the wavelengths are by measuring them in nanometers.

What the plant actually recieves as input is individual photons of light measured in "Micro-Einstiens". I bet most of you didn't see that one comming!