Halogen Worklight
June 28th, 2007
How does 12000 mcd led work light compare to a 500 watt halogen worklight?
That depends on the LED and the halogen lamp. The units mcd (millicandela) and W (Watt) do not denote the same type of measurement.
Watt is the unit of measurement for radiant flux, which is the energy radiated by the light source per unit of time. This light may be radiated in ANY direction.
Candela (or millicandela = 1/1000th candela) is the unit of measurement for luminous intensity, which is the amount of energy (of the total energy available as radiant flux) radiated by the source for a unit solid angle, in a certain direction. Synonymous to luminous intensity is radiant intensity, the unit of which is Watt/sr (Watt per steradian which we can clearly see is not the same as Watt).
1 Watt/sr = 683cd = 683000 mcd.
This means that you can have two light sources with the same available radiant flux (say 500 Watt), but one may radiate light in a narrow beam of only 1steradian while the other source radiates in a wide solid angle of 3sr. The first source will then have a radiant intensity of 500 W/sr (or 3415 cd), while the second source has a radiant intensity of only 500/3 = 166.6 W/sr (or 822.23 cd).
Lets assume that your halogen lamp radiates light in a full sphere (which is 4pi sr) and your LED radiates in only half a sphere (2pi sr). The radiant intensity of your halogen lamp is then 500/4pi, or 39.7887 W/sr, making its luminous intensity 27176 cd. That is more than two thousand times higher luminous intensity than the 12000mcd (= 12cd) LED.
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Voltec 08-00615 700-Watt Halogen Pro Worklight, 5-Foot, Blue & Yellow $0.99 |
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GRASSHOPPER Worklight Kit (Halogen), 184179, 604895, 182250, 182245, 182251 $0.99 |
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(1) HALOGEN WORKLIGHT BULB 150w ROUGH SERVICE LIGHTBULB $1.73 |
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500 Watt HALOGEN BULB (Floor Lamp / Work Light) NIP $2.20 |
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(1) HALOGEN WORKLIGHT BULB 150w ROUGH SERVICE LIGHTBULB $2.20 |
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500 Watt Halogen Replacement Bulb Shop Work Lights Outdoor Spot 118mm T3 Halogen $2.75 |
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WHOLESALE LOT OF HALOGEN WORK LIGHTS $3.25 |
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Bayco Rite-Lite Halogen Clamp Work Light $4.99 |
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TWIN HALOGEN WORK LIGHT 1000W TELECOPING SELF STORAGE WITH HANDLE & ROLLERS $5.00 |
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Dorcy Worklight Halogen Bulb $5.00 |
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150 Watt HALOGEN Work Light BULB 150W 130V 130 Volts R7S T3 Bright Effects Rough $5.39 |
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2 PHILIPS 500-WATT RSC Base T3 Halogen Work Light Bulbs $6.99 |
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120 Volt Halogen Flood/Work Light Bulb 100 Watt (2) $6.99 |
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COOPER LIGHTING PQS45 – 500 WATT HALOGEN WORK LIGHT $7.00 |
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Whelen LFL Liberty or Patriot 500 series halogen take down alley work lights $7.00 |
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Sylvania 300T3Q-CL-RP 300w Work Light Lamp Bulb Rough Service Halogen Quartz $7.50 |
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Husky 35 Watt Halogen Work light $7.99 |
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Northern Industrial 500W Portable Halogen Worklight #NI-1002 $7.99 |
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120 Volt / 250 Watt Halogen Bulb for Flood Lights, Work Lights & Floor Lamps $7.99 |
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Portable Halogen Worklight 500 Watt 521-896 $7.99 |
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Dorcy 20 Watt Halogen Worklight Bulb $7.99 |
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Workforce Portable Halogen Worklight 250-Watt model 510-047 $8.00 |
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12 VOLT MAGNETIC HALOGEN WORKLIGHT CHIL0118 $8.29 |
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Whelen LFL Liberty or Patriot 500 series halogen take down alley work lights $9.95 |
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DESIGNERS EDGE L-860 250W HALOGEN WORK LIGHT – NEW! $9.95 |
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Hobbs Halogen Work Lights, 1 pair, 4″ x 6″, 50 Watt 12VDC Wide Flood – 71898 $9.99 |
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Craftsman 500 Watt Halogen Portable Worklight 73832 $9.99 |
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Designers Edge L-18 Home Light One-Light 500-Watt Halogen Portable Work Light $9.99 |
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Prime Portable Halogen Work Lights – Floodlights – 500 Watt Lamp MIB $9.99 |
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Forklift Halogen Worklight, Pendant Mount, 48v 35Watts $9.99 |
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FOUR PHILIPS 300W WORK LIGHT & SECURITY – 300 WATT HALOGEN BULBS – # BC300T3QCL $10.00 |
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FOUR PHILIPS 300W WORK LIGHT & SECURITY – 300 WATT HALOGEN BULBS – # BC300T3QCL $10.00 |
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HOME LIGHT PORTABLE WORK-LIGHT – 500 WATT HALOGEN BULB – NON-SLIP HANDLE $10.50 |
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L-20 500w Halogen Portable Work Light $10.95 |
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Designers Edge L16 T-3 130-Volt 500-Watt4 5/8″ Halogen Work Light Bulb NIB 2 PK $11.99 |
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Model L-860 250 Watt Yellow Halogen Portable Work Light $12.59 |
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EML Technologies WL250PS-E 250-Watt Halogen Portable Work light, Yellow $12.92 |
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Speedway Series 12 Volt Magnetic Halogen Worklight $12.95 |
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Ecco E91001 12v Halogen Flood Light Worklight 4″ rubber worklight $12.95 |
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Halogen Flood Work Light (5.75 x 3.5) 12v 55w 570 $12.95 |
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500 Watt Halogen Portable Work Light $12.99 |
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Portable 150W Halogen Work Light Floodlight Spot Lamp Garden Indoor Outdoor $13.17 |
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NEW STARLAMP/PLYTMOUTH PORTABLE HALOGEN WORKLIGHT 500W $13.49 |
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Bayco SL-1012 35-Watt 12V Halogen Work Light w/Clamp (Yellow) $13.99 |
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Bayco SL-1000 Clamp Work Light-35W Halogen 18/3 $13.99 |
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150 watt HALOGEN WORK LIGHT $14.00 |
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NEW REGENT WORKLIGHT 500 WATT HALOGEN WORKLIGHT $14.23 |
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Caster QH-815 Halogen Work Light. T-3, 78mm 150W $14.40 |
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Craftsman Halogen Worklight With Tripod WL500SPT-S $14.65 |
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Halogen Spotlight Worklight 250Watt/125 Watt Mount 4 Ways Adjustable Heavy Duty! $14.87 |
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Coleman 07772 500W Portable Halogen Work Light $14.95 |
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Heavy Duty Flood Work Light 55 watt Halogen Truck $14.95 |
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Dual Halogen Work Light – Floor Base $14.99 |
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NEW Voltec 08-00209 500W Portable Halogen Worklight $14.99 |
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HALOGEN WORK LIGHT BULBS……QUALITY…….500W $14.99 |
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BRAND NEW Bayco Halogen Clamp Light / Work Light, NIB $14.99 |
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Designers Edge L32 300-Watt 130-Volt 4 5/8″ Halogen Work Light Bulb NIB 2 PK $14.99 |
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Forklift Halogen Worklight, RH Lateral Mount, 12v 35W $14.99 |
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Workforce One-Light 500-Watt Halogen Portable Work Light $14.99 |
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Workforce 500-Watt Halogen Portable Work Light (Bulb not included) $14.99 |
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Forklift Halogen Worklight, Pendant Swivel Mt. 12v, 55w $14.99 |
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150 WATT HALOGEN WORK LIGHT MODEL 5150 NEW $15.00 |
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Halogen Work Lights – Twin 500 Watt Lights $15.00 |
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500 watt HALOGEN WORK LIGHT $16.50 |
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COOPER LIGHTING SINGLE HALOGEN STAND WORKLIGHT $16.99 |
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K Tool 73370 Halogen Work Light 500 Watt 5′ 18/3 SJTW Cord $16.99 |
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New WorkForce Portable Halogen Worklight 250W $16.99 |
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NIB 500 WATT Portable Halogen Worklight $17.11 |
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NEW! CUSTER PRODUCTS S712 HALOGEN WORKLIGHT, SPOTLIGHT 6″X3.5″ 12V 55W $18.00 |
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Ecco E91102 12v Halogen Flood Light Worklight 4″ Square Spotlight $18.95 |
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MOOSE RACING 12V HALOGEN WORK LIGHT $18.95 |
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PORTABLE CLAMP WORK LIGHT,CRAFTSMAN 4-IN-1 125/250 WATT HALOGEN 2 LIGHT LEVELS $18.99 |
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500 WATT HALOGEN WORK LIGHT MODEL 5500 NEW $19.00 |
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Cooper Lighting 500 Watt Halogen Portable Worklight PQS45 $19.53 |
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Halogen Flood Work Light DUAL BULB 12v 110w (2×55) 659 $19.95 |
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Bayco SL-1012 35-Watt 12V Halogen Work Light with Clamp $19.97 |
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ONE 12V 12 VOLT HALOGEN 55 WATT H3 BULB 4″x 6″ EQUIPMENT MILITARY WORK LIGHT**JD $19.99 |
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500 Watts Halogen Work Light Home / Shop + Bulb Camping Outdoor Garage DIY Tools $19.99 |
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ONE 24V 24 VOLT HALOGEN 70 WATT H3 BULB 4″x 6″ EQUIPMENT MILITARY WORK LIGHT**AP $19.99 |
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ONE 24V 24 VOLT HALOGEN 70 WATT H3 BULB EQUIPMENT MILITARY RUBBER WORK LIGHT*EM $19.99 |
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ECCO E91001 Round Halogen Worklamp TRUCK WORK LIGHT $19.99 |
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Cooper Lighting 250 Watt 4-in-1 Halogen Portable Worklight PQS2504IN1 $19.99 |
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5 Code 3 Excalibur takedown work lights halogen $19.99 |
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ONE 24V 24 VOLT HALOGEN 70 WATT H3 BULB EQUIPMENT MILITARY RUBBER WORK LIGHT**DR $19.99 |
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ONE 6V 6 VOLT HALOGEN H3 BULB EQUIPMENT MILITARY RUBBER WORK LIGHT**FW $19.99 |
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HALOGEN FLOOD WORK LIGHT LAMP 4.0″ T X 7.5″ W $20.00 |
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New WorkForce Portable Halogen Worklight 250W $20.99 |
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Master Trades WL500SP-TV 500W Portable Halogen Work Light w S Stand Base $21.99 |
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K-Tool International Halogen Work Light $22.00 |
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NEW! HALOGEN WORKLIGHT, PLOW LIGHT RUBBER HOUSING 4″ ROUND 12V 55W $22.50 |
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500W Halogen Work Light ~ 2-N-1 Convertible w/ 4′ Tripod ~ Construction $22.88 |
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BAYCO SL-1002 Halogen Project Work Light 500w $23.03 |
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New Moose ATV Work Light 12-Volt Halogen Light $23.95 |
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150 Watt Halogen Bright Work Light Construction Garage Portable Flood Light $23.99 |
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500 WATTS HALOGEN WORK LIGHT HOME / SHOP + BULB PRO NEW $23.99 |
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NEW 55W HALOGEN WORK LIGHT, REVERSE, CAMPING FLOOD LAMP $24.30 |
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500 Watt Halogen Project Work Light Home Lamp W/Bulb Weather Resistant New Auto $24.49 |
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DMK Heavy-Duty Halogen Worklight-3in x 5in 12V 55W Bulb #ED-102-1 $24.99 |
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DMK Heavy-Duty Halogen Worklight-5in x 5in 12V 55W Bulb #HD-120-1 $24.99 |
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DMK Heavy-Duty Halogen Worklight – 3″ x 3″, 12 Volt 55W $24.99 |
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Eml Technologies Llc-import WL500DPT2-TV Tripod Halogen Work Light 1000 Watts $36.04 “MASTER TRADESMAN” TRIPOD HALOGEN WORK LIGHT 1000Watts Halogen work light |
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Designers Edge L-789 Mercury Vapor 175-Watt Mogul Base Lamp $5.95 … |
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20W 12V G4 Repl Lamp $1.99 2 pack Xenon 20W, 12V, replacement bulbs…. |
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Fulcrum 20019-301 Battery-Operated LED Clip-On Task Light $22.11 Add extra light at the BBQ and other workspaces with this LED light. Its clip-on design lets you install it anywhere in seconds. An adjustable gooseneck lets you aim the light from 6 bright LEDs right where you need it. Battery-operated…. |
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Designers Edge E-103 Cord Storage Wheel $5.85 Tangle free storage of extension cords, holiday lighting, rope, hose, light wire. Holds up to 150′ of 16/3 gauge cord or holds up to 125′ of 14/3 gauge cord…. |
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Designers Edge E245 150-Watt Incandescent Clamp Light with 6-Foot Cord $8.58 This lamp includes a 150 watt incandescent light bulb and includes a 6-foot cord, aluminum shade, and heavy clamp, and can be used with up to an 150-watt bulb…. |
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HELLA H15986021 Rubber Housing 4.75 Halogen Work Lamp $9.62 Lights Utility: H3 Work Lamp; 55 watt; 887; single… |
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HELLA H15986001 Rubber Halogen 4¾ inch Work Lamp $8.68 Work lights with rugged construction and awesome output from Hella.These work lamps from Hella are setting new standards for heavy-duty illumination. Extended service life, low-power consumption, and expanded illumination of the work zone are just some of the advantages of choosing Xenon lighting. When picking a work lamp, consider the type of activity to be illuminated, the mounting position, an… |
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ABL Work Light – Halogen 3×5 Flood – 24 Volt $24.99 This 3×5 heavy duty Halogen work light is designed for the tough applications on tractors, bull-dozers, wheel-loaders, mining equipment or any other heavy equipment. This is light is a high quality replacement for the 3×5 or 4×6 lights on your equipment at an economical cost. The fiberglass reinforced plastic housing and glass lens provide high resistant to vibration. This model is a flood light p… |
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Lighted USB 4 Port Hub- Silver $17.95 MCNCPQ14USB Compaq USB 4-Port Mobile Hub, Silver… |
