- Location
- Bremerton, Washington
- Occupation
- Master Electrician
What were the lumens with the MH and what were the LED lumens? its possible the MH was too bright and the LEDs are more appropiate.
CFL's, Wattage Equivalents
- Thread starter jmellc
- Start date
- Status
- Occupation
- Licensed Electrician
That's a good point. I am not anti LED, but the light from them is just different in a way I cannot describe.
The spectrum is different.
Try Google images with the search term
spectrum led sunlight
The first hit shows comparative spectrums for several light sources.
Electric-Light
Senior Member
LEDs also have trouble meeting chromatic consistency from chip to chip.
Buy a box of fluorescent tubes and they will all look the same. Buy the same kind, but from a different batch, you may see a very slight difference, but nothing like you see from chip to chip on LEDs.
Buy a box of fluorescent tubes and they will all look the same. Buy the same kind, but from a different batch, you may see a very slight difference, but nothing like you see from chip to chip on LEDs.
dbuckley
Senior Member
- Location
- Canterbury, New Zealand
The "right color" LED lamps are available, but not for CFL alternative use yet.
gar
Senior Member
- Location
- Ann Arbor, Michigan
- Occupation
- EE
110130-1010 EST
G._S._Ohm:
Is the following web site the one you wanted us to find? This did not provide much useful information on the spectra of different sources.
http://ultraledlights.com/full_spectrum_grow_light.htm
It would be much more useful if you provided the actual address instead saying use these Google search terms. Any two times you search Google with a set of terms you may not get the same results. Google is dynamic.
.
G._S._Ohm:
Is the following web site the one you wanted us to find? This did not provide much useful information on the spectra of different sources.
http://ultraledlights.com/full_spectrum_grow_light.htm
It would be much more useful if you provided the actual address instead saying use these Google search terms. Any two times you search Google with a set of terms you may not get the same results. Google is dynamic.
.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Maybe it was the forum's anti-cat-walking-on-the-keyboard filter.
That is some sophisticated software
A lot of it might have to do with the optics of the old lights. Any fixture with a dropped lens, or with a lamp where the sides are visible provides both vertical and horizontal illumination. Newer fixtures, including full cuttoff fixtures, tend to provide only horizontal illumination. They light flat surfaces very well (including the ground), but not vertical surfaces like peoples faces.
A lot of cities are passing ordinances that limit the amount of vertical illumination they will allow.
ptonsparky
Tom
- Occupation
- EC - retired
Closest I could come so far to the 500 inc. http://e3living.com/150-watt-high-wattage-cfl-500-watt-replacement-4
Electric-Light
Senior Member
http://e3living.com/200-watt-high-wattage-cfl-600-watt-replacement is what you'll need.
I checked out the specs on 120v 500W A-lamps.(shaped like normal light bulb). It's between 10,000 to 10,700 lumens. Halogen T3 is also about the same. The 150W one is understating the output of 500W incandescent by 20%.
10,000 lumens from 200W is only 50 lumens per watt. It's about half the efficacy of T8 multi-tube setup and that's the penalty you pay for pushing a lot of power in a small lamp. The lumen loss is much more aggressive on CFLs as well. You're probably looking at 20% loss over life of 10,000 hours.
The output loss is negligible with T8s, because the lamps are not driven so hard because the lamps are comparatively huge. The life is also around 36,000 hours at 12 hours/cycle , or 24,000 hours at 3hrs/cycle
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