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Off the shelf retail store screw-in LED and CFL bulb comparisons
- Thread starter blynx
- Start date
HuffnPufferfish
Member
and you wanna argue about mdf leaking gasses and he painting cardboard (paint doesnt gas) while its not mdf so it doesnt gass
most likely ive been growing in more ikea closets than youve seen in your life, what mold?
do you even miss the fact that you should make a closet light/airtight and isolated, and not even USE the wooden parts as a wall?
N
Navigator
Here's the LED cab after eight weeks of flowering.
C99 x Shire (SSSDH)
Day 56 Flower
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C99 x Shire (SSSDH)
Day 56 Flower
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TheScrogFrog
Active member
Looking chunky!
Tested a few of the Philips LED bulb ballasts for temps.
8.5w Philips ballast maxed out around 120F.
14.5w Philips ballast maxed out around 180F.
Pretty significant difference between the two.
Tested a few of the Philips LED bulb ballasts for temps.
8.5w Philips ballast maxed out around 120F.
14.5w Philips ballast maxed out around 180F.
Pretty significant difference between the two.
M
Mr. Sparkle
Looking very nice
N
Navigator
Yeah, I would love to see a comparison of measured heat output between those Phillips bulbs and their CFL counterparts.
ima try a few of these to supplement my vert hps.
http://ledlight.hydroponics-system....and-greenhouse-hydroponic-led-plant-lighting/
http://ledlight.hydroponics-system....and-greenhouse-hydroponic-led-plant-lighting/
It's bit strange that they quote the intensity of a burple lamp in Lux.
Have you measured one to see if it's really 36W at the wall?
I have had several lamps like that which claim they are 3W LEDs and are only running them at 1Watt.
They might be too tall for the limited space in a PC grow.
TheScrogFrog
Active member
TheScrogFrog
Active member
Alrighty, gathered several bulbs I had laying around..
CFL ballast heat test results:
10w GE Brand CFL ballast maxed out around 165F.
13w GE Brand CFL ballast maxed out around 194F.
42w GE Brand CFL ballast maxed out around 188F.
42w Ecosmart Brand CFL ballast maxed out around 211F.
Note: I let 'em run for about an hour each and periodically checked temps all around the ballast and recorded the maximum temps. All soft white.
Only thing I am wondering is why the GE brand 42w temp so low? Larger ballast/more even heat distribution? Dunno. It made me curious so I checked a different 42w CFL brand I had laying around, it's an "Ecosmart" and has a much smaller ballast than the 42w GE brand CFL. Didn't have a 23w or 26w around to test, thought I did.. but I couldn't find 'er.
Interesting results.
CFL ballast heat test results:
10w GE Brand CFL ballast maxed out around 165F.
13w GE Brand CFL ballast maxed out around 194F.
42w GE Brand CFL ballast maxed out around 188F.
42w Ecosmart Brand CFL ballast maxed out around 211F.
Note: I let 'em run for about an hour each and periodically checked temps all around the ballast and recorded the maximum temps. All soft white.
Only thing I am wondering is why the GE brand 42w temp so low? Larger ballast/more even heat distribution? Dunno. It made me curious so I checked a different 42w CFL brand I had laying around, it's an "Ecosmart" and has a much smaller ballast than the 42w GE brand CFL. Didn't have a 23w or 26w around to test, thought I did.. but I couldn't find 'er.
Interesting results.
Shove them in a Kill-A-Watt and check that they are drawing roughly what is claimed from the wall socket.
HuffnPufferfish
Member
bigger diameter more surface area better cooling
i took an 'old' 20w cfl to hang above a clone i revegged, instead of the 8w led, and all i was thinking was 'shit, wheres my light??' clf is soooo last year now
i took an 'old' 20w cfl to hang above a clone i revegged, instead of the 8w led, and all i was thinking was 'shit, wheres my light??' clf is soooo last year now
The big problem with CFL, and most other "last year" lamps, is that they spread the light out in almost a sphere, which requires lossy reflectors to get it pointing to the plants. LEDs have the reflector built into the chip already at a miniature scale where it's more efficient, so instead of the light coming out 360degrees, it might be only a 120degree cone which is a useful spread.
TheScrogFrog
Active member
TheScrogFrog
Active member
That's good, they are all within 10% of advertised spec.
The surface area per watt determines the temperature. Retail LED bulbs typically measure about the same as those CFL, over 170F (80C) at the base which is the heatsink. They hurt if you try and touch them. If I were a bulb designer, I wouldn't run them that hot. but I guess you don't want them to last forever or you will go out of business
