# How do you calculate lighting requirements?

## How do you calculate lighting requirements?

Multiply width of room x length of room x 1.5 = amount of total minimum wattage needed (assuming an eight foot ceiling). Divide by 60 to get the number of 60-watt equivalent bulbs required. Then, add up the wattage in each bulb in each fixture to figure out how many light fixtures are needed.

How do you calculate how many LED lights do I need?

To determine the needed lumens, you will need to multiply your room square footage by your room foot-candle requirement. For example, a 100 square foot living room, which needs 10-20 foot-candles, will need 1,000-2,000 lumens. A 100 square foot dining room, which needs 30-40 foot-candles, will need 3,000-4,000 lumens.

### How do you calculate lighting requirements for a shop?

Add the square feet of all the sections together to find the total square footage. Multiply the square footage by the desired lighting intensity in foot candles per square foot. Suppose your shop has a total square footage of 1,800 square feet and you want a lighting level of 30 lumens per square foot.

How many watts do I need for a room light?

For a room with decent natural light, that should be around 60 watts. For a room with few/no windows, balance the 60 watt desk light with ambient overhead lights or bump that number up to 75 watts.

#### How many can lights for a 12×12 room?

The typical rule-of-thumb is 24″ from each wall, and then 3-5 feet between cans. So in a 12′ room you’d probably want two rows of lights. Considering it is a bedroom and you don’t need it as bright as a kitchen, you can probably get away with 2 rows of 4 lights for a total of 8.

How do I calculate LED lights for a room?

## How many lights do I need per square foot?

As a handy rule of thumb, a sitting room or bedroom will generally require around 10-20 lumens per square foot, while a bathroom or kitchen will need a stronger level of lighting, at around 70-80 lumens per square foot. To work out the lumens you need, simply multiply the square footage of the room by this figure.

Is 60 watts enough to light a room?

For a room with decent natural light, that should be around 60 watts. For dark kitchens and more opaque fixtures, try 100 watts. If you get a lot of natural light, try using a slightly dimmer 80 watt bulb. – Bathroom Sconces Keep bathroom sconces around 60-80 watts (But, this can be split.

### How many can lights in a 20×20 room?

If you have a center light fixture, you should be able to use 4 inch line voltage cans or low voltage for supplemental lighting. I would go with at least 8 three inch cans for a 20 foot room.

How many LED recessed lights per room?

Make a Plan Whatever new recessed lighting you add should work with your existing fixtures. Measure your room to see how many fixtures you will need. A common rule of thumb is that you use one recessed light for every 4 to 6 square feet of ceiling space. Doing so provides even, overall illumination.

#### What is the recommended lumens per square foot?

How to calculate how much light a room needs?

How to Calculate How Much Light a Room Needs Step 1. Measure the length and width of the room . Divide unusually shaped rooms, such as L-shaped rooms, into two… Step 2. The purpose of the room guides lighting placement. Multiply the width by the length for each room or room… Step 3. Adjust the

## How to calculate the lumens needed in a room?

Use the light table to find out how many lux or footcandles you need.

• or the area in square feet by the footcandles.
• work out how many bulbs you need. Divide the number of lumens by the number of lumens delivered by each bulb.
• How much lighting do I Need?

For general lighting purposes, you’ll want to provide 1.5 watts of lighting per square foot of space in the room. So, to get the amount of lights you’ll need in the room, first measure to get the room’s square footage.

### How much lighting do you need?

The Illuminating Engineering Society (IES) guidelines recommend a minimum of 50 lumens per square feet of space. So the average one-car garage needs a minimum of 13,200 lumens while the a two-car garage requires a minimum of 20,000 lumens. This can increase based on how you use your garage.

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