Too much light??

[Kassiopeija]

when they write "equivalent" - to what kind of lightsource do they refer to? Incandescant?¿?

and why is "watts" so important when you guys talk about light? really, it's about the amount of photons arriving at your plants per day in the right spectrum (a number that will change also with the stage of your plants development...)

you're really asking if you should add another 250W to 500W not realizing a 50W LED stripe or an old 125W CFL could do the same job if it's just at the right distance? why would you move your lights so freaking far away anyway? I think you need to learn the basic physics of light in the first place...

 

[Kassiopeija]

I’m new to growing. I just wanna say thanks for the link. I have 5 g fabric pots and like the idea to raise them. I’m buying a couple of the saucers and raisers

you only need the raisers if you're using mineralic ferts. not helpful in organic grows

 

[Kassiopeija]

And just for reference, LED tech will save you 1/5 to 1/4 in energycost when compared to the light output of a 600W HPS (which would be fitting perfectly to your growspace).

 

[Frank Nitty]

Should be ok. Not sure if you need all 3 running for seedlings.

Each unit draws about 250watts.

"Nominal Power: 248W"

Still a lot of wattage... 3 lights on 10 plants??? Gotta find the sweet spot for those type of lights to get the most out of your grow... Good luck!!!

 

[coreywebster]

Hi everyone, I ordered two LED lights from Amazon and they accidentally shipped me an extra one. I'm not complaining. Here it is.

I set up and want to utilize the third but I'm concerned about the amount of light these all emit at once. I have them 40 inches away from seedlings, recommended by GREENGO. They are full spectrum 1200W equivalents. Tent is 60"x60"x80". Temps are sitting at ~74°F and humidity 65% for reference. I just transplanted all 10 babies to 3 Gallon smart pots and need the surface area covered now.

View attachment 4414795

Personally I would use two of them closer if you can still keep your temps up (which can afford to be a few degrees higher)
If not then 3 high up works the same.

You only need a small amount of light for seedlings but since you've gone with massive pots you need to cover the area.

500 true watts will do in veg, a 4th light in flower would be better than 3.
In this case its the temps I would look to, two lights and a fan speed controller or 3 lights high without one.

 

[Airwalker16]

when they write "equivalent" - to what kind of lightsource do they refer to? Incandescant?¿?

and why is "watts" so important when you guys talk about light? really, it's about the amount of photons arriving at your plants per day in the right spectrum (a number that will change also with the stage of your plants development...)

you're really asking if you should add another 250W to 500W not realizing a 50W LED stripe or an old 125W CFL could do the same job if it's just at the right distance? why would you move your lights so freaking far away anyway? I think you need to learn the basic physics of light in the first place...

When they say "equivalent to", they're referring to what the potential of the diodes in the fixture are actually capable of. Meaning there is some mixture of 2,3,5, or 10watt diodes in the fixture that if ran at that power level, would equal 1200w. But they always half Ass and use about 1/4 what they're capable of putting out

 

[Frank Nitty]

I haven't had any issues with my LEDs. We are talking about LEDs right? The energy-efficient light emitting diodes? This is the right place....LED lighting forum. Ok. These lights are fine and dandy, my friend. I hate repeating myself. This is solid advice? Telling me to return free shit? These aren't advertisements, they're clearly specifications. GREENGO is legit from my experience. Again, you guys are quick to judge when you shouldn't be. The first post answered my question about 10 percent. "Should be ok." Thanks for that. I'm out.

Tell it!!! If they work for you,that's all that matters!!! There are led strips that have all the colors of the rainbow,but they're not considered to be blurpie??? How does that work??? I understand about the wattage thing,but aside from that,before the rise of the QB and white light everything was like Skittles... A rainbow... And I'll admit that I got caught up in the madness being a newbie and went right along with believing something that I didn't know if it was trie or not... Bottom line is do you... Grow some big buds and prove all the doubters wrong... My name is Frank Nitty and im running for president!!! Send all contributions in chronic!!! And I promise you all a plant in every household!!! Smoke weed everyday!!!

 

[Frank Nitty]

Tell it!!! If they work for you,that's all that matters!!! There are led strips that have all the colors of the rainbow,but they're not considered to be blurpie??? How does that work??? I understand about the wattage thing,but aside from that,before the rise of the QB and white light everything was like Skittles... A rainbow... And I'll admit that I got caught up in the madness being a newbie and went right along with believing something that I didn't know if it was trie or not... Bottom line is do you... Grow some big buds and prove all the doubters wrong... My name is Frank Nitty and im running for president!!! Send all contributions in chronic!!! And I promise you all a plant in every household!!! Smoke weed everyday!!!

Whew!!! That was serious!!!

 

[Prawn Connery]

when they write "equivalent" - to what kind of lightsource do they refer to? Incandescant?¿?

and why is "watts" so important when you guys talk about light? really, it's about the amount of photons arriving at your plants per day in the right spectrum (a number that will change also with the stage of your plants development...)

you're really asking if you should add another 250W to 500W not realizing a 50W LED stripe or an old 125W CFL could do the same job if it's just at the right distance? why would you move your lights so freaking far away anyway? I think you need to learn the basic physics of light in the first place...

This is pretty much on the money - watts aren't watts. Watts can only be used as a measurement if you also know the efficiency (ie, how much energy is lost to heat) as well as the spread and strain. There are quite a few variables.

That said, your plants will tell you how high to hang those lights. While it's a bit hard to tell from the photos, those seedlings don't appear to be stretching too much and so you may already have them in a good spot.

Just keep an eye on growth and if they start to overlly stretch, lower the lights, and if they start to show any signs of bleaching, raise them again. You will get the hang of things as you grow. Good luck.

 

[Kassiopeija]

When they say "equivalent to", they're referring to what the potential of the diodes in the fixture are actually capable of. Meaning there is some mixture of 2,3,5, or 10watt diodes in the fixture that if ran at that power level, would equal 1200w. But they always half Ass and use about 1/4 what they're capable of putting out

but that's illogical. a "potential" is not an equivalent! if you run that at only 1/4 of power how can that reach the equivalent light output as if run at full strength?
it is only an equivalent if the light output is the same. but if you only feed it with 1/4 of power it will, the light output will be reduced linearily (at best... normally efficiency will sink even more) so it's absolutely wrong to calk to this an equivalent. Even more so with this old technology.

I have 4*75W dimmable COB LEDs here which produce 209 lumen per watt if run at full strength but if I dimm that down to 50% the lumens will decrease likewise. Also no equivalent here.

 

[Frank Nitty]

This is pretty much on the money - watts aren't watts. Watts can only be used as a measurement if you also know the efficiency (ie, how much energy is lost to heat) as well as the spread and strain. There are quite a few variables.

That said, your plants will tell you how high to hang those lights. While it's a bit hard to tell from the photos, those seedlings don't appear to be stretching too much and so you may already have them in a good spot.

Just keep an eye on growth and if they start to overlly stretch, lower the lights, and if they start to show any signs of bleaching, raise them again. You will get the hang of things as you grow. Good luck.

Well said...

 

[Airwalker16]

but that's illogical. a "potential" is not an equivalent! if you run that at only 1/4 of power how can that reach the equivalent light output as if run at full strength?
it is only an equivalent if the light output is the same. but if you only feed it with 1/4 of power it will, the light output will be reduced linearily (at best... normally efficiency will sink even more) so it's absolutely wrong to calk to this an equivalent. Even more so with this old technology.

I have 4*75W dimmable COB LEDs here which produce 209 lumen per watt if run at full strength but if I dimm that down to 50% the lumens will decrease likewise. Also no equivalent here.

Well, as far as LEDs go, the lower the current the higher Lumen per watt. But Chinese sellers wanna boast the highest # they can to sell their products to people who dont understand the way they advertise.
And you're just making it more confusing for yourself. There's no equivalent as far as light output. The Chinese can get away with stating 1200w because if the had the right drivers on that fixture to get the current higher, near each diodes maximum wattage, it'd be around 1200.