Slashdot Mirror
Screw-in LED Floodlights
Anonymous Coward writes "This company claims to have the first LED flood lights that you simply screw in as a replacement for your old bulb. enluxled.com are also claiming it's cool enough to handle, more damage resistant, longer lasting (50,000 hours) and only uses 22w to produce twice the light of a 100w bulb." And hideously expensive, but you never have to change them.
Reasons for using LED over Flourescent:
1) When a flourescent bulb fails, it stops giving off light completely. Usually and LED light will only have 1 led fail at a time. Given theis, you don't have large areas of darkness and don't have to replace the bulb immediatley when a part fails. LEDs fail gracefully.
2) LEDs are more resistant to damage.
3) The LEDs appear to not need to be replaced as often as Flourescent. The largest "Pain" in lighting is having to replace the bulbs. If these new LEDs last sufficiently longer than Flourescnets, they pay for themselves in labor.
4) I'm not sure about this, but I don't think I've seend flourescent spot lights before. However, the LEDs might be able to put out more light than flourescents.
Fly me to the moon Let me sing among those stars Let me see what spring is like On jupiter and mars
THIS IS NOT TRUE!!
The specs for the light are I beleive 300 lumens. This is more like a 45-60 watt bulb.
A 100 watt bulb might generate 1500+ lumens.
It still is significantly more efficient, and with a SIGNIFICANTLY longer life span, but it is not equal to a 100 watt bulb.
When these first came out (won some awards) I checked them out for this very thing.
They also are not an all around type light a la a lightbulb, more of a spotlight (90 degree beam angle?), so better for flooding a wall or artwork with color / light.
Still super cool. Still a bit expensive.
It's been a while, but I think most of the numbers are still correct;
Lumens/Watt Light Source
100-190 low pressure Sodium (HID)
(150 90W low pressure sodium lamp, clear)
50-150 High pressure Sodium (HID)
(115 1000W dual arc-tube high pressure sodium lamp, clear)
100 Sylvania 18 watt low pressure sodium
84 32W, 48" MOL, T8 OCTRON fluorescent lamp,
60-65 standard F40T12 cool white fluorescent
64 250W mogul based metal halide lamp, clear
60 150W single ended compact metal halide lamp
48-60 compact fluorescents
45-55 Super bright Red/Orange LED
35-45 Super bright Green LED
17.5 Tungsten Halogen Single-End SUPER-Q Frosted Finish D.C. Bay 100Watt
17.5 100W Incandescent A19 Bulb, softwhite
14.5 60W Incandescent A19 Bulb, softwhite (standard bulb)
6 incandescent night light bulb (7w)
6w incandescent flashlight bulbs
For normal home lighting T8 fluorescents are probably your best bet today.
LEDs are good when you're want colored light, when you want a small amount of light, or when the cost/hassle of replacing the bulb is the major factor.
Cree recently announced a 75 lumens per watt white LED, but AFAIK they aren't available in quantity yet.
There's a lot of hope for the future of LEDs, but they're still a few years off.
-- should you believe authority without question?