How Many Lights Do I Need?

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.

How many lights do I need calculator?

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 the amount of light needed in a 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. Then, add up the wattage in each bulb in each fixture to figure out how many light fixtures are needed.

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 Wall lights do I need?

One fixture every 8 to 10 feet should be adequate, though you may want slightly more or less space depending on the lumen output and size of the room and fixtures. Staggering the lights so that they don’t line up across the hallway is a more natural configuration.

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 lighting for an area?

Lighting Calculation – Summary
Multiply the area in square meters by the lux, 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 many light 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 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 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 far apart should LED can lights be?

To determine how far apart to space your recessed lights, divide the height of the ceiling by two. If a room has an 8 foot ceiling, you should space your recessed lights approximately 4 feet apart. If the ceiling is 10 feet, you’ll want to put about 5 feet of space in between each fixture.

Can you have too many recessed lights?

It often seems that installing recessed lights is a cure all, but they cannot properly wash light upon walls and all dark corners, which would bounce reflective light into the room. In fact, using too many recessed light may leave areas of your room dark and may even cost you more on your electric bill.

How many LED recessed lights per room?

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.

Do wall lights and ceiling lights have to match?

When you combine a lamp, ceiling lights and wall lights in the same style, it can have a suffocating, ‘overdone’ effect. Instead, opt for just two variations of the same design at the most within a smaller space, and match ceiling and wall lights whilst opting for a pairing with a different lamp variation.

Are wall lights outdated?

It’s no doubt that wall lights are a timeless trend, regardless of when that trend began. Just because wall lights have been around for a while, that doesn’t make them outdated. They have and always will be a great option for lighting any room whilst adding style and creative distinction.

How far apart should wall lights be?

As a general rule of thumb, wall lights should be positioned around 152-170cm (around 5-5.5ft) above floor level, while multiple wall lights should be placed around 250-300cm (or 8-10ft) apart. You should aim for the top of the wall light to sit at eye level, to avoid glare from the exposed bulb.

How many LED ceiling lights do I need?

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.

How do you layout can lights in a room?

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 can lights per circuit?

Assuming a 60 watt light, you can put up to 24 lights on a 15 amp breaker. If you are using low-wattage LED bulbs, an LED bulb using 10 watts, you can install up to 150 bulbs on a single circuit.

How do you calculate lighting design in a building?

The simple and basic approach for calculating the lighting requirement is to divide the total light requirement of the room by light output (lumen) provided by a single lamp.
Space to Height ratio

1. H_m = Mounting height.
2. A = Total floor area.
3. N = No. of Luminaires.

How many watts of light do I need per square foot?

The average LED grow light draws about 32 watts to cover 1 sq ft for flowering. Compare this to a typical HID fixture which rings in at 40 watts per square foot (assuming a 5′ x 5′ area, or 25 sq ft coverage area). Using an HID in a 4′ x 4′ will bring the power coverage up to 62.5 watts per sq ft.