how to choose a power supply

How to Choose a Power Supply for Tape LightingFor tape lighting, the power requirement is determined by the wiring confi guration, the LED density (the number of LEDs per metre) of your chosen lighting and the length of lighting.

The lengths shown in the charts are totals for the tape lighting only (at full brightness) in various wiring confi gurations. Do not include the length of connecting wire when consulting the charts. Exceeding the recommended lengths stated will cause LEDs farthest from the power supply to appear dimmer due to voltage drop. Replacing your power supply with one of higher wattage output will not remedy this, but a change in wiring confi guration can. For this reason, we recommend that you consider the wiring confi guration when planning your project.A straight-run layout uses single or multiple lengths of tape lights in sequence powered at only one end.A center-feed layout powers two equal lengths of tape lighting from a central position; a loop-back layout powers both ends of the LED tape simultaneously (e.g., for room perimeter cove lighting).

An array layout powers several separate legs of tape light that branch off from the power supply. This confi guration makes the best use of the capacity of the larger power supplies so is a good choice for large installations and long lengths of tape light. Calculate the power requirement of each array segment, add them together for the total wattage needed and then choose the power supply that meets or exceeds that requirement.

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Household installations of LED lighting require a power supply to convert standard 120 volt AC electrical power to 12 volt DC power. When choosing a power supply, consider how it will be connected to your home’s power supply (by plug or hardwired) and the number and confi guration of your lights.

Step 3: Select a Power Supply

For white LEDs, there are two types of power supply to choose from based on how you want to control your lighting. The easiest installation, suitable for many retrofi t projects, is to simply plug a standard 12V DC power supply into a household AC outlet. An optionalDC dimmer or switch can be connected after the power supply. If you want to use a stan-dard in-wall AC dimmer switch to control your LED lighting, such as those you might already have elsewhere in your home, choose an AC-dimmable 12V DC power supply. Note that installing this type of power supply is more involved, requiring a hard-wired connec-tion to a 120V AC household circuit. Dimma-ble power supplies are typically used in larger renovation projects or new construction where you can access in-wall wiring more readily.

For color-controlled LEDs, you will need a standard 12V DC power supply as well as a separate color controller.

Select a power supply based on the total wattage required for your lighting arrange-ment, choosing one with an output that equals or exceeds your calculated need. For installations combining tape and individual LED lights, add the power requirements to-gether to determine the power supply needed.

Straight run

Loop back

Array

Power supply

Power supply

2’

4’

6’

Layout confi guration: straight run

Power supply

SpliceWire lead to wire

How to Choose a Power Supply

Power supply

Power supply

Center feed

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How to Choose a Power Supply for Tape Lighting

For up-to-date charts detailing power supply requirements, visit leevalley.com and search for "power supplies".

1

3

2

Connect by soldering:1: Strip wires 2: Connect wire lead to wire3: Seal connection with a shrink tube

Connect without soldering by using a

wire-ready connector.

Maximum Tape Lengths for Straight Layouts (at full brightness)

LED Tape Lighting

Standard 12V DC Power SupplyAC-Dimmable

12V DC Power Supply*

LEDs/m8W

00U41.87$ 23.40

20W00U41.88

$ 34.60

30W00U41.83

$ 51.00

60W00U41.84

$ 69.50

100W00U43.30

$ 78.50

24W 00U43.20

$ 53.00

45W 00U43.21

$ 79.50

60W 00U43.22$ 106.00

120W00U43.23$ 135.00

WhiteNote: our 120 LEDs/m tape lighting

is for indoor use only.

30 6И (1.8m) 21И (6.4m) 32.8И (10m) 32.8И (10m) 32.8И (10m) 32.8И (10m) 32.8И (10m) 32.8И (10m) 32.8И (10m)

60 2И (0.6m) 8.2И (2.5m) 16.4И (5m) 16.4И (5m) 16.4И (5m) 12И (3.7m) 16.4И (5m) 16.4И (5m) 16.4И (5m)

120 1.6И (0.5m) 4.5И (1.4m) 7.6И (2.3m) 16.4И (5m) 16.4И (5m) 5.5И (1.7m) 13И (4m) 16.4И (5m) 16.4И (5m)

Color-ControlledNote: our 60 LEDs/m tape lighting


30 3.3И (1m) 9И (2.8m) 16.4И (5m) 32.8И (10m) 32.8И (10m) * Not for use withcolor-controlled lighting.

60 4.4И (1.3m) 7И (2.1m) 16.4И (5m) 16.4И (5m)

Maximum Tape Lengths for Center-Feed or Loop-Back Layouts (at full brightness)

LED Tape Lighting


12V DC Power Supply*

LEDs/m8W

00U41.87$ 23.40

20W00U41.88

$ 34.60

30W00U41.83

$ 51.00

60W00U41.84

$ 69.50

100W00U43.30

$ 78.50

24W 00U43.20

$ 53.00

45W 00U43.21

$ 79.50

60W 00U43.22$ 106.00

120W00U43.23$ 135.00

WhiteNote: our 120 LEDs/m tape lighting


30 4.5И (1.4m) 16И (4.9m) 26И (8m) 65.6И (20m) 65.6И (20m) 19.6И (6m) 59И (18m) 65.6И (20m) 65.6И (20m)

60 7И (2.1m) 12И (3.7m) 32.8И (10m) 32.8И (10m) 9И (2.8m) 19.6И (6m) 32.8И (10m) 32.8И (10m)

120 6.6И (2m) 15.2И (4.6m) 32.8И (10m) 5И (1.5m) 10И (3m) 15И (4.6m) 32.8И (10m)

Color-ControlledNote: our 60 LEDs/m tape lighting


30 8.2И (2.5m) 15И (4.6m) 32.8И (10m) 65.6И (20m) * Not for use withcolor-controlled lighting.

60 14И (4.25m) 26И (8m)

Maximum Wattage for Array Layouts (at full brightness)

Standard 12V DC Power SupplyAC-Dimmable 12V DC Power Supply

(not for use with color-controlled lighting)

8W 00U41.87

$ 23.40

20W00U41.88

$ 34.60

30W00U41.83

$ 51.00

60W00U41.84

$ 69.50

100W00U43.30

$ 78.50

24W 00U43.20

$ 53.00

45W 00U43.21

$ 79.50

60W 00U43.22$ 106.00

120W00U43.23$ 135.00

In an array confi guration, each leg is wired as a straight layout. Determine the wattage required for each leg, based on its length, and add them together to determine the total power needed. Select a power sup-ply that equals or exceeds that total wattage. Do not create a leg longer than the maximum shown in the last column.*If your project requires a length of tape lighting longer than the maximum, use an array of multiple shorter segments to achieve that result.

LED Tape Lighting Example:

Leg 1 is 6И of 30 LEDs = 8W



Total wattage = 26W

Choose a 30W standard or

45W AC-dimmable power supply.

White

Note: our 120 LEDs/m tape lighting is for indoor use only.

30 LEDs

/m

Length3.3И(1m)

6.6И(2m)

9.8И(3m)

13И(4m)

16.4И(5m)

19.7И(6m)

26.2И(8m)

32.8И(10m)

Watts 4.5 8.5 12 15 17 19 22 23

60LEDs

/m

Length1.6И

(0.5m)3.3И(1m)

4.9И(1.5m)

6.6И(2m)

8.2И(2.5m)

9.8И(3m)

13И(4m)

16.4И(5m)

Watts 5 9 13 16 19 22 25 28

120LEDs

/m

Length1.6И

(0.5m)3.3И(1m)

4.9И(1.5m)

6.6И(2m)

8.2И(2.5m)

9.8И(3m)

11.5И(3.5m)

13И(4m)

14.8И(4.5m)

16.4И(5m)

Watts 8 15 21 27 32 36 40 43 46 48

Color-Controlled

Note: our 60 LEDs/m tape lighting is for indoor use only.

30LEDs

/m

Length1.6И

(0.5m)3.3И(1m)

6.6И(2m)

9.8И(3m)

13И(4m)

16.4И(5m)

19.7И(6m)

23И(7m)

26.2И(8m)

*32.8И(10m)

Watts 4 8 15 21 25 29 32 35 38 40

60LEDs

/m

Length1.6И

(0.5m)3.3И(1m)

4.9И(1.5m)

6.6И(2m)

8.2И(2.5m)

9.8И(3m)

11.5И(3.5m)

13И(4m)

14.8И(4.5m)

*16.4И(5m)

Watts 8 15 22 28 33 37 41 44 46 48

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For individual (non-tape) LED lighting, the appropriate power supply wattage is determined by the number of lights being used and their wattage at full brightness. For example, a 20W power supply will effectively run fi ve of the 4W downlights. Exceeding the recommended wattage of the power supply will cause the lights farthest from the power supply to appear dim due to voltage drop.

How to Choose a Power Supply for Individual Lighting

Maximum Number of Individual LED Lights (at full brightness)

LED LightWatt/unit


12V DC Power Supply

8W 00U41.87

$ 23.40

20W00U41.88

$ 34.60

30W 00U41.83

$ 51.00

60W 00U41.84

$ 69.50

100W00U43.30

$ 78.50

24W 00U43.20

$ 53.00

45W 00U43.21

$ 79.50

60W 00U43.22$ 106.00

120W00U43.23$ 135.00

Mini-Recessed, White 1 8 20 30 60 100 24 45 60 120

Mini-Recessed, Color-Controlled 1.2 6 16 25 50 83

Downlight 4 2 5 7 15 25 6 11 15 30

Wafer Light 3 2 6 10 20 33 8 15 20 40

Landscape Light, White 5 1 4 6 12 20 4 9 12 24

Landscape Light, Color-Controlled 10 2 3 6 10

Spotlight 3 2 6 10 20 33 8 15 20 40

Adjustable-Beam Spotlight 8 1 2 3 7 12 3 5 7 15

RigidStripTM Light Bars 3.5 2 5 8 8* 8* 6 8* 8* 8*

*The maximum number of RigidStrip lights in one leg. To power additional lights, wire multiple legs up to the capacity of the power supply. See instructions for details.

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Powering LED Lights with a 12V BatteryTo use LED lighting in the interior of a boat or RV, you just need to connect it to a 12V battery. Simply maintain correct polarity, matching the “+” and “-” labels on the lighting or lead wires with the “+” and “-” terminals on the battery.

AC-Dimmable Power SuppliesTo control the brightness of your white LED lighting using an in-wall AC dimmer switch,* you need an AC-dimmable power supply. Installed between a dimmer switch and the LED lighting, these units are intended for direct connection to 120V AC household wiring. Not for use with color-controlled lighting.00U43.20 24W AC-Dimmable Power Supply $ 53.00 00U43.21 45W AC-Dimmable Power Supply $ 79.50 00U43.22 60W AC-Dimmable Power Supply $ 106.00 00U43.23 120W AC-Dimmable Power Supply $ 135.00

AC-dimmablepower supply

8 watt

20 watt

60 watt 100 watt30 watt

* Most common dimmers can be used, but a C·L dimmer (see page 19), which has features specifi c to LED lighting, is recommended.

Standard 12V DC Power SuppliesThe 8W to 60W power supplies are rated for indoor installation only; however, they can be used to power outdoor lighting if you install the power supply indoors and run outdoor-rated wiring from it to the lights. The 100W power supply is certifi ed for use in damp environments (IP67 rating). If you install the 100W power supply outdoors, we rec-ommend consulting your local electrical building code before connecting it to household electrical power. It is advisable to install any outdoor power supply and electrical connections where they are shielded from exposure to the elements. The 8W to 60W standard power supplies come prewired with a 60” (1.5m) AC cord with a plug end for use in a standard 120V AC outlet. Can be used with white or color-controlled LED lighting.00U41.87 8W Standard Power Supply $ 23.40 00U41.88 20W Standard Power Supply $ 34.60 00U41.83 30W Standard Power Supply $ 51.00 00U41.84 60W Standard Power Supply $ 69.50 00U43.30 100W Standard Power Supply $ 78.50

See Skylark® C.L dimmer on page 19

3”11/2”

To order call 1-800-267-8767 or visit our website at leevalley.com

how to choose a power supply

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