Use these easy steps to determine what Razorlux Lighting fixture will meet your specific lighting requirements for room.
Determine Room Square Footage
Multiply the Length times the Width of the Room to get the Room Square Footage. For example, if the room is 10 feet wide and 10 feet long, the Room Square Footage will be 100 square feet.
Determine the Foot Candles by Room Type or Room Purpose
A foot-candle is how bright the light is one foot away from the source. Lighting requirements/needs vary depending on the type of room being lit. For example, a bathroom or kitchen will require more foot-candles than a living room or bedroom.
- Foot Candles Needed
Determine the Needed Lumens
lumen is a unit of measurement of light. A lumen is a way of measuring how much light gets to what you want to light. 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.
Find a Matching Maxim Lighting Fixture to Meet Your Needs
Maxim Lighting has provided you the rated lumen output under “Rated Lumens” on most products on the Web Site.
For example, the Passion 4-Light Semi-Flush Mount, 39981BCPS, has a rated lumen output of 2,688. This fixture will provide more than enough light for the living room with a 1,000-2,000 lumen requirement, but would not provide enough light for a dining room with a 3,000-4,000 lumen requirement.
How to Calculate Lumens Per Square Foot?
Once you’ve measured the room and calculated the required foot candles, it’s time to determine how many lumens a space needs. Multiply your room square footage by your foot candle requirement.
Here’s an example using a 100 square foot living room:
- 100 sq. ft. X 10-20 foot candles = 1,000 to 2,000 lumens.
A lumen is a unit of measurement indicating the visible light output of a light source. In practical terms, lumens tell you how bright a light bulb is. Light bulbs and some lighting fixtures carry a specific lumen value. The higher the lumens, the brighter the bulb. Lighting designers often use lumens per square foot to ensure a home has sufficient lighting. The basic calculation is very simple:
Lumens provide an accurate way to measure light output of any light source.
- Lumens per square foot = total lumens divided by the total square footage of the area.
You can use this calculation to determine how much light per square foot you currently have in a room or to find out how much light you need (or should have) in a given area.
Measuring Square Footage
Square footage is the same thing as wall-to-wall floor space. To measure the square footage of a room, measure the width and the length of the room, then multiply the numbers. For example, a 10-foot-wide, 12-foot-long room is 120 square feet (10 x 12 = 120).
If you’re curious to know how much light a room is getting, simply add up the lumens of all the light bulbs in the room, and then divide by the room’s square footage to find the lumens per square foot. For example, for a 120-square-foot room with a single overhead fixture with two light bulbs, each producing 800 lumens:
- 800 + 800 = 1,600 lumens
- 1,600/120 = 13.3 lumens per square foot.
Finding the lumens is easy. Most energy-efficient (LED and fluorescent) light bulbs have their lumens value printed right on the bulb base. Incandescent bulbs list the lumens on the bulb packaging; if you can’t find that, look for the wattage rating on the bulb’s base and convert that to lumens using a wattage–lumens chart.
Recommended Lumens By Room
Lighting experts recommend the following levels of light for various rooms in a home. These guidelines relate to general room lighting, such as that provided by standard ceiling fixtures or multiple lamps. In areas intended for work or reading, you would likely include additional, focused light (called task lighting) to brighten specific locations where light is crucial, such as kitchen countertops.
- Living room: 10–20 lumens per square foot
- Dining room: 30–40 lumens per square foot
- Bedroom: 10–20 lumens per square foot
- Bathroom: 70–80 lumens per square foot
- Hallways: 5–10 lumens per square foot
- Kitchen (general lighting): 30–40 lumens per square foot
- Kitchen (task areas): 70–80 lumens per square foot
- Laundry room: 70–80 lumens per square foot.
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