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Off the shelf retail store screw-in LED and CFL bulb comparisons
- Thread starter blynx
- Start date
As Reikox said: LEDs aren't designed to be held, they're designed to be bright. Our application of household LEDs isn't the standard use - these are incandescent replacements.
Incandescents run substantially hotter than CFLs (and the LEDs that replaced them) and most sockets / fixtures / lamp shades / can lighting reflectors are designed to handle the heat of incandescent / halogen bulbs.
Increasing the surface area of the bulb will increase its natural cooling, but also means that the heat which is dissipating from the bulb is more rapidly entering the grow space. Any way you look at it, LEDs produce less heat than CFLs with substantially more light, so clinging to CFLs as a light source is "so last year"
Incandescents run substantially hotter than CFLs (and the LEDs that replaced them) and most sockets / fixtures / lamp shades / can lighting reflectors are designed to handle the heat of incandescent / halogen bulbs.
Increasing the surface area of the bulb will increase its natural cooling, but also means that the heat which is dissipating from the bulb is more rapidly entering the grow space. Any way you look at it, LEDs produce less heat than CFLs with substantially more light, so clinging to CFLs as a light source is "so last year"
HuffnPufferfish
Member
60watts hot? i use a 5w halogen bulb to vaporize hash 
terp, the more/faster you can get the heat off the heatsink the faster you can pull that damn heat out of the room
im still waiting for someone to make a led water cooled setup running that water back into a bucket to warm the hydro setup for the plant, fuck yeaaah
terp, the more/faster you can get the heat off the heatsink the faster you can pull that damn heat out of the room
im still waiting for someone to make a led water cooled setup running that water back into a bucket to warm the hydro setup for the plant, fuck yeaaah
60watts hot? i use a 5w halogen bulb to vaporize hash
terp, the more/faster you can get the heat off the heatsink the faster you can pull that damn heat out of the room
im still waiting for someone to make a led water cooled setup running that water back into a bucket to warm the hydro setup for the plant, fuck yeaaah
You can do that off the shelf with water blocks for cooling CPUs. It's not cost effective. You will be better off just heating the hydro seperately.
N
Navigator
8.5w phillips LED = 60 watt equivalent = 120F
13w GE CFL = 60 watt equivalent = 194F
Cheers ScrogFrog. I like those numbers.
13w GE CFL = 60 watt equivalent = 194F
Cheers ScrogFrog. I like those numbers.
R
ratsidecar
R
ratsidecar
The hempy buckets are only 4 litres, they seem to dry out a bit too quickly and need watered every day with the plants getting a bit droopy between waterings. The plants in them are growing much quicker than the soil one however and there is some purpling of the stems and yellowing leaves so they seem to be wanting a bit more nitrogen.
4L is over a gallon, that should be fine, how far from the bottom did you drill the hole? Should be 2" if it dries too fast, change the pearlite/vermiculite ratio to include more vermiculite.
What temperature are you running at?
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R
ratsidecar
The hole is 2" from the bottom, 3 parts perlite to 1 part vermiculite. Will maybe try 3 parts perlite to 2 parts vermiculite next time and see if that helps.
Perhaps the strain that is in them is particularly greedy
Perhaps the strain that is in them is particularly greedy
Gnz
Member
60watts hot? i use a 5w halogen bulb to vaporize hash
Halogen bulb vaporizer is genius, I wonder what the bulb surface temp is.
I'm using a 50w GU10 halogen bulb to heat my whole cab over winter, puts out far less light than 18w of LED.
R
ratsidecar
After 2 weeks of 12/12
Hey guys, I'm putting together my first cab and I'm just wondering what color bulbs you're using for veg/flower? I went through the entire thread but may have missed it plainly spelled out.
I've seen standard 2700/6500k mentioned but also just running the entire thing under 5000k?
I've seen standard 2700/6500k mentioned but also just running the entire thing under 5000k?
HuffnPufferfish
Member
they. all. work.
I realize they may all work, but the question was more about what you guys have settled on after experimentation rather than what is theoretically possible.
Just because something might work doesn't mean its optimal.
Read the text under "Effect of light quality".
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0099010
PoweredByLove
Most Loved
after experimentation we have come to the conclusion it doesn't matter what spectrum of bulb you use to grow they are all equally shit when compared to the sun so it doesn't really matter. all 5K lights no problem, all 2700K lights no problem, a mix of all in between, no problem. they are all equally not the sun.
You are obviously jumping to conclusions without real research.
If you are only testing screw in retail lamps then you are getting about half the intensity in the PAR spectrum that a proper LED COB like a CXB3590 will give you.
Plant growth comes from the number of photons that hit it in the PAR spectrum per day. A lot of sunlight is out of the PAR spectrum.
The sun moves, and has cloud cover, objects get in the way, so the number of PAR photons that to the plants in a day, are greatly reduced.
We can get light so intense indoors that it bleaches the plant, have you seen that happen in sunlight?
PoweredByLove
Most Loved
um...this is a thread about screw in bulbs...why don't you take that cree cob shit to the cree cob led thread?
i've been growing weed and conversing with weed growers from all across the planet for 20+ years... lol no experimentation though...cuz color spectrums are some new shit just invented last week.
no 4000K bulbs or 2700K bulbs anywhere until last week right? no red HPS lights, no white Flurorescents, no blue Mh. none of that...untill right now when crees and cobs were invented. i have no idea what i'm talking about.
i'm off to the store to buy some new fangled technologies so i can test how plants grow under different spectrums of light...
gee i hope i can figure it all out. i don't even have my rocket science degree yet.
i've been growing weed and conversing with weed growers from all across the planet for 20+ years... lol no experimentation though...cuz color spectrums are some new shit just invented last week.
no 4000K bulbs or 2700K bulbs anywhere until last week right? no red HPS lights, no white Flurorescents, no blue Mh. none of that...untill right now when crees and cobs were invented. i have no idea what i'm talking about.
i'm off to the store to buy some new fangled technologies so i can test how plants grow under different spectrums of light...
gee i hope i can figure it all out. i don't even have my rocket science degree yet.
HuffnPufferfish
Member
it was more of a "you dont have that many options to start with" white light comes 99% in 3k (2700 with bulb)or 4k the rest is hard to sell to consumers, plus that im NOT seeing any difference in 3/4/5k
AND when i started growing plants i was one of the "i need 6500 for veg mannnn" and spend 10x the amount for a 6500k instead of a 3x more wattage and 10x less money 2700k
it dun do shit...
