The end of LED is nigh. Incandescent will rise again.
- Thread starter Sativied
- Start date
pop22
Well-Known Member
it seems to me, your comparing a still developing technology with a model T with a supercharger on it. Incandescent light technology is scraping the bottom of the barrel to extract the last useful bits from it. So even if current arguments in its favor are valid, how much longer will that last? the ability to increase photosynthesis from its IR radiation is offset by all useless waste heat it also creates, as the IR output in far in excess of whats needed, heating objects in the growspace, etc.
Sativied
Well-Known Member
That's not a bad analogy. I'm comparing the super charger technology to other specific technology and aspects of different types of lighting though, and it's really not my comparison. I reported the comparison others made globally. They obviously added 'more efficient than led' and 'outperform led' to attract readers, just as the first part of this threads' title doesn't mean led is going away... This thread isn't simply about 'incandescent vs led' and who wins what, but incandescent and led and hid and heat. Spun off: https://www.rollitup.org/t/have-any-of-you-diy-cob-growers-finished-a-crop-under-1000w-de-hps-poll.883181
cdgmoney250
Well-Known Member
From Wikipedia...
https://en.wikipedia.org/wiki/Luminous_efficacy
"The following table lists luminous efficacy of a source and efficiency for various light sources. Note that all lamps requiring electrical/electronic ballast are unless noted (see also voltage) listed without losses for that, reducing total efficiency.
Category Type Overall luminous efficacy (lm/W) Overall luminous efficiency
Combustion
candle 0.3 0.04%
gas mantle 1–2 0.15–0.3%
Incandescent
100–200 W tungsten incandescent (230 V) 13.8–15.2 2–2.2%
100–200–500 W tungsten glass halogen (230 V) 6.7–17.6–19.8 2.4–2.6–2.9%
5–40–100 W tungsten incandescent (120 V) 5–12.6–17.5 0.7–1.8–2.6%
2.6 W tungsten glass halogen (5.2 V) 19.2 2.8%
tungsten quartz halogen (12–24 V) 24 3.5%
photographic and projection lamps 35 5.1%
Light-emitting diode
white LED (raw, without power supply) 4.5–150 0.66–22%
4.1 W LED screw base lamp (120 V) 58.5–82.9 8.6–12%
5.4 W LED screw base lamp (100 V 50/60 Hz) 101.9 14.9%
6.9 W LED screw base lamp (120 V) 55.1–81.9 8.1–12%
7 W LED PAR20 (120 V) 28.6[27] 4.2%
7 W LED PAR30 (110-230 V) 60[28] 8.8%
8.7 W LED screw base lamp (120 V) 69–93.1 10.1–13.6%
Theoretical limit for a white LED with phosphorescence color mixing 260–300 38.1–43.9%
Arc lamp
carbon arc lamp 2-7 0.29-1.0%
xenon arc lamp 30–504. 4–7.3%
mercury-xenon arc lamp 50–55[32] 7.3–8%
UHP – ultra-high-pressure mercury-vapor arc lamp: initial, free mounted 58–78 8.5–11.4%
UHP – ultra-high-pressure mercury-vapor arc lamp: rated, with reflector for projectors 30–50 4.4–7.3%
Fluorescent
9–32 W compact fluorescent (with ballast) 46–75 8–11.45%
T8 tube with electronic ballast 80–100 12–15%
PL-S 11 W U-tube, excluding ballast loss 82 12%
T5 tube 70–104.2 10–15.63%
70-150W Inductively Coupled Electrodeless Lighting System 71-84 10-12%
Gas discharge
1400 W sulfur lamp 100 15%
metal halide lamp 65–115 9.5–17%
high pressure sodium lamp 85–150 12–22%
low pressure sodium lamp 100–200 15–29%
Plasma display panel 2-10 0.3–1.5%
Ideal sources
Truncated 5800 K blackbody 251 37%
Green light at 555 nm (maximum possible luminous efficacy) 683.002 100% "
EDIT
https://en.wikipedia.org/wiki/Luminous_efficacy
"The following table lists luminous efficacy of a source and efficiency for various light sources. Note that all lamps requiring electrical/electronic ballast are unless noted (see also voltage) listed without losses for that, reducing total efficiency.
Category Type Overall luminous efficacy (lm/W) Overall luminous efficiency
Combustion
candle 0.3 0.04%
gas mantle 1–2 0.15–0.3%
Incandescent
100–200 W tungsten incandescent (230 V) 13.8–15.2 2–2.2%
100–200–500 W tungsten glass halogen (230 V) 6.7–17.6–19.8 2.4–2.6–2.9%
5–40–100 W tungsten incandescent (120 V) 5–12.6–17.5 0.7–1.8–2.6%
2.6 W tungsten glass halogen (5.2 V) 19.2 2.8%
tungsten quartz halogen (12–24 V) 24 3.5%
photographic and projection lamps 35 5.1%
Light-emitting diode
white LED (raw, without power supply) 4.5–150 0.66–22%
4.1 W LED screw base lamp (120 V) 58.5–82.9 8.6–12%
5.4 W LED screw base lamp (100 V 50/60 Hz) 101.9 14.9%
6.9 W LED screw base lamp (120 V) 55.1–81.9 8.1–12%
7 W LED PAR20 (120 V) 28.6[27] 4.2%
7 W LED PAR30 (110-230 V) 60[28] 8.8%
8.7 W LED screw base lamp (120 V) 69–93.1 10.1–13.6%
Theoretical limit for a white LED with phosphorescence color mixing 260–300 38.1–43.9%
Arc lamp
carbon arc lamp 2-7 0.29-1.0%
xenon arc lamp 30–504. 4–7.3%
mercury-xenon arc lamp 50–55[32] 7.3–8%
UHP – ultra-high-pressure mercury-vapor arc lamp: initial, free mounted 58–78 8.5–11.4%
UHP – ultra-high-pressure mercury-vapor arc lamp: rated, with reflector for projectors 30–50 4.4–7.3%
Fluorescent
9–32 W compact fluorescent (with ballast) 46–75 8–11.45%
T8 tube with electronic ballast 80–100 12–15%
PL-S 11 W U-tube, excluding ballast loss 82 12%
T5 tube 70–104.2 10–15.63%
70-150W Inductively Coupled Electrodeless Lighting System 71-84 10-12%
Gas discharge
1400 W sulfur lamp 100 15%
metal halide lamp 65–115 9.5–17%
high pressure sodium lamp 85–150 12–22%
low pressure sodium lamp 100–200 15–29%
Plasma display panel 2-10 0.3–1.5%
Ideal sources
Truncated 5800 K blackbody 251 37%
Green light at 555 nm (maximum possible luminous efficacy) 683.002 100% "
EDIT
Last edited:
cdgmoney250
Well-Known Member
Well, somehow that table got all fuckered up when I posted it....