common lamps
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Benjamin W. Kidd - ENGR-162/12
Common Lamps
Commercially Available Lamps and Their Features
Benjamin W. Kidd - ENGR-162/12
Lamp Features and Specifications
Lamp Life – Average lifetime (usually in hours) of the lamp
Wattage – Electrical Power that the Lamp consumes (Unit: Watts - duh!)
Voltage – Rated Voltage to be used at. Usually incandescent/halogen lamps can run on either AC or DC. Do NOT Exceed the rated voltage.
Benjamin W. Kidd - ENGR-162/12
Lamp Features and Specifications
Beam Spread – The angle of coverage that most of the light is focused in.
Benjamin W. Kidd - ENGR-162/12
Base Types
Different Lamps use different types of bases. It is important to know which one you want.
The “Medium” base is the most common, used in most residentialIncandescent fixtures.
Benjamin W. Kidd - ENGR-162/12
Types of Lamps:
Type A – “Standard” type of lamp, used in most desk lamps, general purpose residential lighting.
Type “A” Lamp (120V)Courtesy of www.mcmaster.com
Benjamin W. Kidd - ENGR-162/12
Types of Lamps:
PAR Type – Parabolic Aluminized Reflector, Reflecting/optical mechanisms are contained within the lamp. Often used for outdoor security lights.
PAR 38 (120V) LampCourtesy of www.mcmaster.com
PAR 36 (12V) LampCourtesy of www.mcmaster.com
Benjamin W. Kidd - ENGR-162/12
Types of Lamps:
R Type – “Reflector” lamp, typically used in Track lighting. More directional than “A” lamp but not as directional as PAR lamp.
R40 (120V) LampCourtesy of www.mcmaster.com
R20 (120V) LampCourtesy of www.mcmaster.com
Benjamin W. Kidd - ENGR-162/12
Types of Lamps:
MR 16 – A “contemporary” lamp used in decorative track lighting. Note this is a 12V lamp and CANNOT be used on 120V Systems directly. These are usually available in very directional models.
MR16 (12V) LampCourtesy of www.mcmaster.com
Benjamin W. Kidd - ENGR-162/12
Dining Room Dimmers
How to Build a Portable Incandescent Lamp Dimmer
Benjamin W. Kidd - ENGR-162/12
Building a Portable Dimmer Pack
Materials
Pictures from www.lowes.com and www.allelectronics.com
Benjamin W. Kidd - ENGR-162/12
Cost Estimate
Portable Incandescent Lamp Dimmer
Parts List/Cost EstimateVendor Part No. Description Price Ea. Qty Subtotal
Lowe's 70784 600-Watt White Slide Dimmer $ 7.83 1 $ 7.83
Lowe's 70669 Switch/Receptacle Wallplate $ 0.59 1 $ 0.59
Lowe's 10005 PVC Two Gang Box $ 1.61 1 $ 1.61
Lowe's 70684 Residential Duplex Receptacle $ 0.46 1 $ 0.46
All Electronics FHP-2 In-line AGC (3AG) Fuse Holder $ 0.50 1 $ 0.50
All Electronics FS-5 5A 3AG Fuse (5 Pack) $ 0.75 1 $ 0.75
Personal -- 3 Wire Appliance Cord $ - 1 $ -
Subtotal $ 11.74
Overcharge (For tax, unexpected costs, etc.) 30% $ 3.52
Total Estimate $ 15.26
Benjamin W. Kidd - ENGR-162/12
Schematic Diagram
Benjamin W. Kidd - ENGR-162/12
Fusing the Dimmer
It is important to fuse the dimmer to protect against overloads and short circuits.
To properly size the fuse, you need to know the power rating of the dimmer. Then use P = V x I to calculate the fuse amperage.
600W/120V = 5A
Benjamin W. Kidd - ENGR-162/12
Wiring Diagram
Benjamin W. Kidd - ENGR-162/12
Final Product
Benjamin W. Kidd - ENGR-162/12
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