CFL vs LED vs Incandescent Bulb

A 60W incandescent bulb, a 20W compact fluroescent light [CFL] and a 3.5W white light-emitting diode [WLED] walk into a bar....

Category:

Science & Technology

Tags:

• physics
• optics
• LED
• WLED
• CFL
• incandescent
• energy
• savings
• KoonPhysics

[320bit]

Well just a little correction, you said the incandescent was hot and that alot of its energy wasnt going to light. That is the design and definition of an incandescent bulb, it uses heat to create light. So hot it glows.

[KoonPhysics]

@320bit I wouldn't call it a correction, but you are absolutely correct.

The history of illumination has been an evolution from processes that produce light as a secondary effect (campfires and incandescents) to processes that produce light directly. With the LED, you are essentially swamping electrons for photons, so most of that waste heat and waste infrared is eliminated.

[therealrockondon]

arent lends really spendy and unrelible ..LED=OLD TECHNOLOGY 1920S there unreliable as hell for christmas lights...there all meshed together PLUS INCANDESANTS NOW HAVE ENERGY SAVING INCANDESENTS

[KoonPhysics]

@therealrockondon: EFFICIENCY: Heating an object to make it glow produces more heat than light. Basic blackbody physics. RELIABILITY: LEDs have been replacing incandescent in traffic lights and in vehicle brakelights and headlights because they are much more reliable than incandescents. COST: Mass production, thanks to these applications, will bring LED prices down even further and further increase reliability. BTW, the first commercial LEDs came in the 1960s, not 1920s. LEDs are the future.

[freedomunrestricted]

LED is the future in lighting, nothing good can come from mass production and use of a bulb filled with mercury and no public education or proper disposal facilities.

[vibratingstring]

@320bit They are coming. Products are developing very rapidly.

[vibratingstring]

@spottedcuscus

The directional nature of the emitter can, and is, handled with lens design. This is a minor problem.

Ironically the biggest problem for LEDs is heat. While they do run cooler than incandescents, they have to, to survive. Allowing the junction temperature to rise above 200F leads to shortened life to 50% output (which is a common measure of LED life).

[vibratingstring]

@therealrockondon

The reason LED christmas tree lights are unreliable is that they are made of the lowest grade LED chips. When LEDS are made, they are graded and sorted. A top-quality Nichia 20mW chip is 53 cents, not including any circuitry. The LED chips in xmas tree lights are less than a penny apiece. The good chips outlast every other lighting device on the market by more than on order of magnitude.

[spottedcuscus]

Leds are far from taking over the home lighting market simply because they don't dispurse light evenly like the incondescent and the cfl does. They are too directional. Cfl is currently the best option. Incondescents on the other hand produce just 10% light and 90% heat.

[MrSyntheticDesign]

lol it would have been hilarious if he said "wel the LED lights up everything else but the pages are black as hell

[angryadrien]

good video, but in my opinion, if you're comparing bulbs, compare the same type, not floodlight vs non-floodlight.

thanks for the upload

[therealrockondon]

I DISAGREE BUT IM TALKING ABOUT LEDS YOU GROW WITH.I THINK THEY GO OUT IN STRIPS SO 20 GO OUT AT A TIME.I BOUGHT AN LED PANEL AND 26LIGHTS ARE DEAD.CFLS WORK GREAT AND LAST LONG ENOUGH AND THERE

CHEAP BUT I SEE YOUR POINT :) ITS ALL GOOD

[320bit]

@therealrockondon LEDs were probably the best invention ever for lighting. They are indeed the way forward until a new technology is found. Fact is, as koon stated, LEDs ARE a million times more reliable than any cfl or incandescents (which are bulbs, so they can break easily unlike LEDs and with their heat they burn out over time unlike LEDs which dont "burn out") and they come in alot more different colors.

[320bit]

@KoonPhysics Thats a much better way of explaining it. I never actually thought of it as a secondary effect, so thats a new way to look at it for me. Im still pretty opposed to using LEDs for home illumination, they just arnt bright enough and as you said they are directional. I havent seen an LED setup for a home that isnt directional either.