Old skool here, need help finding right information on led ! Please help !

grotbags

Well-Known Member
R

The thread was started by me researching led so............ Already explained ! If them lights are shit I'd like to know why ? Are they blurple ? Just old diodes or something else ?
shits a strong word... to budman they still produce the goods and hes happy so they aint shit to him but if a mate came back from a growshop today in 2021with a budmaster id punch him in the throat for buying shit... :bigjoint:

but seriously its all down to efficacy and diode spread today, more light per watt and spreading that light over the canopy.
them budmasters are just old tech now.
 

Original StinkyG

Well-Known Member
This is the stuff I've been looking at lately. Interesting info and I like the old school metal hoods.

Just had a mooch at them ! Thanks for the link, they use Samsung and osram reds but Samsung diodes are 561c I think ? Can anyone answer my question about bin diodes, are top bin 561c better than lesser bin lm301h ????
 

grotbags

Well-Known Member
Just had a mooch at them ! Thanks for the link, they use Samsung and osram reds but Samsung diodes are 561c I think ? Can anyone answer my question about bin diodes, are top bin 561c better than lesser bin lm301h ????
short answer no. technically there no bins for the lm301h, but there is for the lm301b which is the identical diode. the best bin lm301b's are lm301h's.
 

Hugo Phurst

Well-Known Member
Someone says on a thread that the fanless are cooler but 600w is 600w of heat regardless the source.
That is an inaccurate statement. 600w of heat is 600w of heat, a 600w lamp does not produce 600w of heat. My 600w HPS produces a whole lot more heat than 600w of led. A fan cooled unit uses power to move heat away from the lamp, by using a fan you not only use more power you produce more heat, so yes a fanless unit produces less heat.

, ambient temps yeah still about the same
Nope, considerable less waste heat with led, that's a huge part of their efficiency
 

nogod_

Well-Known Member
It has been explained on this sub forum dozens of times but here's a quick refresher....

Both 600w luminaires put out 600w of heat. It's just a matter of when those watts turn into heat that varies. In an LED tent or room all of the light you produce will convert to heat once it hits enough surfaces. So yes, 600w of LED will eventually produce 600w of heat.

Your 600w HPS doesn't produce more heat than 600w of LED, that is an impossibility of physics. It produces more heat relative to the amount of useable light it produces. But in a sealed room, both 600w sources will heat up the space exactly the same.

Fans aren't going to change how hot your room gets. They will change where your heat is concentrated which is actually a good thing. You'd rather have heat around your plants than staying in the top of your grow space shortening the life of your diodes. A small fan moving air around your space is worth the 10w penalty in my humble opinion but I am far from a efficiency zealot, I grow with 7 year old Cobs. bongsmilie

My 600w HPS produces a whole lot more heat than 600w of led.
 

Hugo Phurst

Well-Known Member
Google: transpiration

You may be an electrician but you are definitely not a botanist.
I'm quite aware of "transpiration" and it's doesn't have a lot to do with turning light into heat.

BTW - Electronic Tech isn't an Electrician & you're no Physicist

What's your degree in anyway?
 

grotbags

Well-Known Member
ah the old which is hotter the chicken or the egg???

think of this, you take two boxes these boxes are made of special material that is 100% insulated ie no heat can escape and 100% reflective so no light can escape. in one box we put a 600w heater that is 100% efficient ie all the watts get turned to heat, then in box two we put a 600w led that is 100% efficient ie every watt is turned into photons.
just before we close the special boxes we put a temp probe in each one and seal them up, we turn on both the heater and the light for 1 hour and then turn them off and wait for 10 hours.

we now check the temp probes in each box, are they the same or different?.
 

Hugo Phurst

Well-Known Member
ah the old which is hotter the chicken or the egg???

think of this, you take two boxes these boxes are made of special material that is 100% insulated ie no heat can escape and 100% reflective so no light can escape. in one box we put a 600w heater that is 100% efficient ie all the watts get turned to heat, then in box two we put a 600w led that is 100% efficient ie every watt is turned into photons.
just before we close the special boxes we put a temp probe in each one and seal them up, we turn on both the heater and the light for 1 hour and then turn them off and wait for 10 hours.

we now check the temp probes in each box, are they the same or different?.
I see where you're going.....but (IMO )in order for your scenario to be applicable in this situation there would have to be identical plants in each box.:P
 
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