Questions About Lights

[bartow]

I have two questions.

1.) Is there a a formula for how much light is needed to cover a square ft. area based on watts? For now, I need to stick with watts because my lights are old and watts is the only number I have access to. If I end up with a ballpark figure that is good enough for right.

2.) Is there an easy way to determine how much it takes in equivalent watts are in terms of genuine watts drawn out of an electrical outlet?

I am not ready to talk about the best lights by brand or anything else. That is for later.

These are LED lights. in case that makes a difference.

Thanks

Bartow

 

[ebcrew]

There used to be a thread on this watts per sq ft. I'm trying to find it but not having luck.

 

[dandyrandy]

It depends also on the type of leds. I ran 5 180watt actual blurples back in 2013 in a 4x4. Worked well actually. Couldn't keep it cool. Probably running 25% light the rest heat watts. Now I run a diy 16 cob setup with 80 watts of 660nm. I usually run 450 watts or so on the cobs. So around 530 watts now. Technology has changed. The new lights are better and going to get better. ymmv

 

[diggs99]

Hps 50+ watts per ft2

blurples 50-60 watts per ft2

CMH 50 watts per ft2

Top bin Leds, 30+ watts per ft2


These are the rough numbers for flowering, you can half them for veg

 

[Hugo Phurst]

These are LED lights. in case that makes a difference.

Actually it does, if you had HID lamps I'd say toss them, but LED's doesn't degrade like MH & HPS.
I'm thinking 45 - 50W/sq ft

equivalent watts are in terms of genuine watts

No.
Check the fixture for a manufacturers sticker, it should say the real wattage there.

 

[Kingrow1]

So 360w led in place of 600w hps and just over 180 in led for a 315cmh, sounds impressive

Hps 50+ watts per ft2

blurples 50-60 watts per ft2

CMH 50 watts per ft2

Top bin Leds, 30+ watts per ft2


These are the rough numbers for flowering, you can half them for veg

 

[diggs99]

So 360w led in place of 600w hps and just over 180 in led for a 315cmh, sounds impressive

Is this really the first time your seeing these numbers for different lighting? or is this your way of trying to start that good ole troll game up in this thread ? I just want to know if i should move forward or slowly back away.


i didnt make up the numbers, im just repeating them from other threads.

There are many posts on the forum tho, not hard to find conversations discussing exactly this, as im sure you know right King? LOL

 

[diggs99]

So 360w led in place of 600w hps and just over 180 in led for a 315cmh, sounds impressive

and i was wrong on the CMH numbers, apparently its 35-40+ watts per ft2....

something tells me you knew this already too tho lol

 

[GBAUTO]

The chart diggs listed is based on the efficacy of different light sources. Photons of PAR are what grow plants and more efficient illuminators for each watt of energy is what that list illustrates.

 

[Kingrow1]

The chart diggs listed is based on the efficacy of different light sources. Photons of PAR are what grow plants and more efficient illuminators for each watt of energy is what that list illustrates.

So why use white leds if their par isnt as efficient as red and blue leds....

Kind of guessing leds contradict their own efficiency which was but spectrum guesswork to start with and hence the adding back of less efficient par wavelengths in the white.

Sucks that hps is on a par with blurple, pretty sure i seen a hps grower outgrow a blurple once but could be very very mistaken.

 

[fragileassassin]

So why use white leds if their par isnt as efficient as red and blue leds....

Kind of guessing leds contradict their own efficiency which was but spectrum guesswork to start with and hence the adding back of less efficient par wavelengths in the white.

Sucks that hps is on a par with blurple, pretty sure i seen a hps grower outgrow a blurple once but could be very very mistaken.

Because good LEDs have a much better spectrum. White leds have some red and blue. Then you have different K ratings of them too. Lots of spectrum range even with white LEDs

 

[Kingrow1]

Because good LEDs have a much better spectrum. White leds have some red and blue. Then you have different K ratings of them too. Lots of spectrum range even with white LEDs

Strange because if you knew the most efficient spectrum for plant growth you would expect something more refined from the years of trying.

So do all leds vary or do they follow the same recipie for max plant growth - so very confusing leds but im sure they must have cracked pefect par for that 40% increased yeilds over hps and blurple

 

[bk78]

Good morning @Kingrow1 shall we start off this beautiful Saturday morning with tossing more shit your way?

fucking troll noob.

 

[fragileassassin]

Strange because if you knew the most efficient spectrum for plant growth you would expect something more refined from the years of trying.

So do all leds vary or do they follow the same recipie for max plant growth - so very confusing leds but im sure they must have cracked pefect par for that 40% increased yeilds over hps and blurple

LEDs are alllll over the place. For sure a "get what you pay for" area. Lots of bro-science and unsubstantiated claims, lots of BS to wade through. There are specific diodes you want to look for when doing it right. Like the samsung 561 and 301.
There are more refined ones yes, but overall they try to balance them to be good for both veg and flower. Some people will split further and get like 3000k for flower and 6500k for veg ect.

 

[diggs99]

LEDs are alllll over the place. For sure a "get what you pay for" area. Lots of bro-science and unsubstantiated claims, lots of BS to wade through. There are specific diodes you want to look for when doing it right. Like the samsung 561 and 301.
There are more refined ones yes, but overall they try to balance them to be good for both veg and flower. Some people will split further and get like 3000k for flower and 6500k for veg ect.

you are wasting your time bud, hes a LED hater , aint no reasoning with a hater....ask him about CFL bulbs and he will be your friend


Good morning King, hope you have a wonderful day!!

 

[fragileassassin]

Was wondering lol.
I run 6500k T5s in my veg, maybe that's close enough to be friends lmaooo

 

[Budzbuddha]

Jesus ... not this lame “ white light “ argument again .... hears a thought... go grab a prism and hold under a white led ... what do you see ?

Multi spectral light ... case closed.
enough if this blurple bullshit.

White LEDs are coated with phosphors that glow with the desired color temperature. "Cool-white" LEDs (more blue) have a colortemperature above about 5000K, while "warm-white" (less blue) ones have a colortemperature below about 5000K

 

[bk78]

LEDs are alllll over the place. For sure a "get what you pay for" area. Lots of bro-science and unsubstantiated claims, lots of BS to wade through. There are specific diodes you want to look for when doing it right. Like the samsung 561 and 301.
There are more refined ones yes, but overall they try to balance them to be good for both veg and flower. Some people will split further and get like 3000k for flower and 6500k for veg ect.

talk to him aboit micro grows,t5,cfl or 250w hps and hes cool. Anything else he doesn’t have a fucking clue.

 

[fragileassassin]

talk to him aboit micro grows,t5,cfl or 250w hps and hes cool. Anything else he doesn’t have a fucking clue.

I like the T5 things too.

 

[Kingrow1]

Hard to think they achieve such efficiency with all that room for improvement, guess we will find out one day in the future whats what

LEDs are alllll over the place. For sure a "get what you pay for" area. Lots of bro-science and unsubstantiated claims, lots of BS to wade through. There are specific diodes you want to look for when doing it right. Like the samsung 561 and 301.
There are more refined ones yes, but overall they try to balance them to be good for both veg and flower. Some people will split further and get like 3000k for flower and 6500k for veg ect.