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Common Lamps

Commercially Available Lamps and Their Features

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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.

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Lamp Features and Specifications

Beam Spread – The angle of coverage that most of the light is focused in.

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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.

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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

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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

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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

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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

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Dining Room Dimmers

How to Build a Portable Incandescent Lamp Dimmer

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Building a Portable Dimmer Pack

Materials

Pictures from www.lowes.com and www.allelectronics.com

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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

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Schematic Diagram

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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

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Wiring Diagram

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Final Product

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