HUSTLERBOY20
Well-Known Member
damn...the best light has always been the sun or is it...ill invent a light bulb that gives off the same lumens as the sun
How many lumens does the sun emit?
- Thread starter jackinthebox
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HUSTLERBOY20
Well-Known Member
TommyHobby
Active Member
stop getting stoned and typing in the forums. The question is F'd up. If you want to know how many Lumens the sun puts out at the ground then 5000 is about right (per square foot). If you want to know how much it is at the sun itself, count all those zero's or put on some SPF 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 sun tan lotion and have a crack at it yourself. GL !
HUSTLERBOY20
Well-Known Member
lol so what does a 500w have per sq ft
riddleme
Well-Known Member
that light already exists it's called CMH Ceramic Metal Halide, what I use
and if ya check my Balls to the wall link you'll see the sun meassured with a light meter under different conditions
twistedwords
Well-Known Member
Google turned this up on a science site.
380000000000000000000000000 Watt
The 1 Watt LS is ~18 lumens per watt, so 6840000000000000000000000000 lumens....
If you can put something equivalent in a portable flashlight, I'll give you a dollar.
Of course, the battery runtimes would be horrible.
380000000000000000000000000 Watt
The 1 Watt LS is ~18 lumens per watt, so 6840000000000000000000000000 lumens....
If you can put something equivalent in a portable flashlight, I'll give you a dollar.
Of course, the battery runtimes would be horrible.
HUSTLERBOY20
Well-Known Member
i need those CMH
twistedwords
Well-Known Member
yes ceramic metal halide, WTF aren't growers using them? I swear if high times doesn't preach to them they wont try it. amazing.
HUSTLERBOY20
Well-Known Member
Vansterdam
Well-Known Member
So which scenario wins, 7 days of grey cold cloudy weather with high humidity or 7 days in a tent under 600W HPS and controlled climate?
My plants are about 3 weeks from finishing and the weather has turned cold and grey. I'm not planning on bringing them in as there is a good amount of sun in the extended forecast, but if I could be convinced...I would consider bringing in a couple if the weather turns grey after next week (which is high probability in Vancouver). I'm more curious to understand the power of the sun in Spring and Fall when there are plenty of grey days...
My plants are about 3 weeks from finishing and the weather has turned cold and grey. I'm not planning on bringing them in as there is a good amount of sun in the extended forecast, but if I could be convinced...I would consider bringing in a couple if the weather turns grey after next week (which is high probability in Vancouver). I'm more curious to understand the power of the sun in Spring and Fall when there are plenty of grey days...
brettmccft0
Well-Known Member
Actually, on a sunny day in california the sun is emitting more like 75,000 lumens per sq ft. LOL, a hps lamp emits like 150,000 at like 2 feet, and you think california grows monster outdoor plants on only 5000 per sq ft?
Prefontaine
Well-Known Member
it doesnt matter how many lumens the sun emits because as light travels it becomes less intense, because it excites the particles it passes through and losses this energy through heat chemical reactions etc...
if you take your 1000 w light and measure lumens at 2" 6" and 2' you will get very different readings
Prefontaine
Well-Known Member
In other words it kinda depends on whether your at sea level, in the mountains, have smog, clear sky, etc..........
Mrfootball420
Well-Known Member
i have read 6k is whats available to the plants on a sunny day, i will try to find where i read it. is not the lumens though, you can easily duplicate that. its the broad spectrum that makes the sun so much more efficient, the lumens are just how bright the light is, not the quality of light.
legallyflying
Well-Known Member
Only a newb focuses on lumens..unless your trying to decide what lights to install when remodeling your fucking kitchen.
Light is nothing more than electromagnetic radiation. The "light" we see radiating from the sun, or your grow bulbs is but a narrow sliver of the total amount of radiation being emitted. Humans needed a unit to measure the light we can see and thus the lumen was born.
Last time I checked, and correct me if I am wrong, I didn't see any eyeballs on my plants. Thus buying light bulbs based soley on lumens is as meaningless as debating which dog whistle would sound best to humans. It's about PAR, as that is the frequency of electromagnetic radiation plants "see", or more specifically, they can utilize to produce glucose from co2 and water.
Halogen bulbs produce a shit load of lumens but you don't see anyone growing plants with them.
The future is led's that can produce the appropriate frequencies of PAR for optimal growth. And you can bet that the newbs will come our in droves asking " how many lumens does that LED put out"
Light is nothing more than electromagnetic radiation. The "light" we see radiating from the sun, or your grow bulbs is but a narrow sliver of the total amount of radiation being emitted. Humans needed a unit to measure the light we can see and thus the lumen was born.
Last time I checked, and correct me if I am wrong, I didn't see any eyeballs on my plants. Thus buying light bulbs based soley on lumens is as meaningless as debating which dog whistle would sound best to humans. It's about PAR, as that is the frequency of electromagnetic radiation plants "see", or more specifically, they can utilize to produce glucose from co2 and water.
Halogen bulbs produce a shit load of lumens but you don't see anyone growing plants with them.
The future is led's that can produce the appropriate frequencies of PAR for optimal growth. And you can bet that the newbs will come our in droves asking " how many lumens does that LED put out"
Bwpz
Well-Known Member
Nice answer haha
legallyflying said:
I disagree. You don't see huge med grow ops rushin for LED's. It's a combination of lumens and spectrum. If it was only spectrum, I'm sure LED's would be great, but they don't have the lumens to back it up. They may not have eyeballs, but they sure have a means for photosynthesis.
Mrfootball420
Well-Known Member
agreed, how about that million dollar led grow? rotfl, oh yeah, that has never happened. lol....