How do you calculate lighting for a room?

To calculate the lighting lumens (formerly wattage) needed in any room: 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.

How do you calculate the amount of light needed in a room?

Multiply your room square footage by the footcandle requirement. For example, a 100-square foot living room, which needs 20 footcandles, will need 2,000 lumens. A 100-square foot dining room, which needs 40 footcandles, will need 4,000 lumens ² (see PDF and complete footcandle index).

What is the formula for calculating lighting?

How do I calculate LED lights for a room?

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 many watts of light do I need for my room?

Multiply the width by the length for each room or room segment, if applicable. Multiply the result by 1.5 to determine the estimated watts to sufficiently light a room. For example, for a room 10 feet wide by 12 feet long, multiply 10 times 12 to get 120, then multiply by 1.5 to get 180 watts.

How Much Light Does My Room Need? Lighting Design | Lighting Calculation Formula

How many can lights for a 12x12 room?

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 how many ceiling lights I need?

Formula: total sq. footage x 1.5 = total wattage needed. Total wattage divided by 60 watts (or whichever wattage you select) = total amount of recessed can lights. Example: 240 square foot room x 1.5 = 360 divided by 60 (the bulb wattage I'd like to use) = 6 recessed lights needed.

How do you calculate the number of lighting fixtures in a certain area?

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 many watts of light do I need per square foot?

An average LED lighting system draws about 32 watts to serve 1 square foot of grow space. The wattage in a grow room could be amplified up to a maximum of 50 watts per square foot. Going beyond that amount would create a too strong indoor plant light intensity, which could stunt the growth of your plants.

How do you calculate lumens per room?

To estimate the number of lumens your space will need, just multiply the square footage of your room by the number of foot-candles required for the space. For example, for a bathroom that is 64 square feet with a foot-candles range of 70-80, you'll need from 70x64 to 80x64 lumens, or 4480 – 5120 lumens.

How far apart do you put LED downlights?

As a rule of thumb, we suggest you divide your ceiling height by 2 to give you the space required between each downlight. For example if your ceiling is 8 foot high, then position your lights 4 feet apart.

How do you calculate the wattage of a room?

Wattage: Multiply the area in feet by 10. For a room 20 feet by 20 feet, we obtain 400 sq. ft., multiplied by 10 to give 4000 watts. The number of watts = area x 10.

How do you calculate watts per square foot?

Divide the wattage consumed in the room by its area in square feet to calculate watts per square foot. In our example, 650 watts divided by 192.89 square feet is 3.37 watts per square feet.

How many bulbs do I need for a room?

Therefore, your room needs a light fixture with a minimum of five lightbulbs or a total of roughly 288 watts (including other lighting sources in the room).

How do you layout a light fixture?

Always Start With Ambient, Even Lighting

Wall sconces work really well placed on either side of a doorway, a mirror, or above a fireplace mantle. Be sure to always keep in mind where you may want to have 'furniture lighting' like floor lamps and table lamps, as those will add light the room as well.

How many can lights in a 20x20 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 can lights do I need in a bedroom?

Every manufacturer will provide a maximum spacing criterion for their lights. For example, for a 6-inch light, typically, the number is 1.5, which should be multiplied by the ceiling height. So, if your ceiling is 8 feet tall, multiplied by 1.5, the maximum space between each light should be 12 feet.

How far to space 6 can lights?

Generally speaking, recessed lights that are four inches in size should be placed four feet apart. Six-inch lights should be placed six feet apart.

How do I calculate recessed lighting?

A good general rule for placement is to divide the height of the ceiling by two. The result is the amount of space to leave between each light. For example, recessed lighting spacing for an 8-foot-high ceiling would be 4 feet between each light. This will provide good spacing for general room lighting.

How many LED recessed lights per room?

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.

How many lumens 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.

What LED wattage for bedroom?

If you are using an LED light bulb, 12 watts is the best wattage for your bedroom. The higher the watt in a bulb, the brighter it will be. Although you want enough light to perform tasks in your bedroom at night, you don't want it so bright that it prevents you from being able to fall asleep.

How much area does a 1000 watt LED grow light cover?

These lights range in power from 100 to 1000 watts. The 400 and 1000 watt lights are the most useful. A 1000 watt grow light can light up an area of about 7 feet square when the light is suspended 2 feet above the plants. A 400 watt light would work for an area of about 4 feet square.

How much light do I need for a 4x4 grow room?

You can scale up the wattage with respect to your grow space. Just remember that one square foot of grow tent space needs roughly thirty-two watts of real wattage. According to research, a 4 x 4 requires around 512 watts, but the wattage can range from 500 to 650 watts.