| Lumens Incandescent light bulb (watts) Fluorescent / LED (watts) | 1500 lm 100 W 25 W | 2250 lm 150 W 37.5 W | 3000 lm 200 W 50 W |
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| LED Lumens | 10W 900 lm | 12W 1,125 lm | 15W 1,500 lm | 20W 2,250 lm |
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This is a measure of how well a light source converts energy (watts) into light (lumens). The old technology of tungsten incandescent bulbs only had an efficacy of about 15 lumens/watt ; LED technology can produce about 60 lumens/watt.
For the average living room of 250 square feet, you’ll need 5,000 lumens as your primary light source (20 lumens x 250 square feet), equivalent to about five 100 watt incandescent light bulbs, five 23 watt CFLs, or eight 10 watt LED light bulbs.
| Old Incandescent Bulbs (Watts) ENERGY STAR Bulb Brightness (Minimum Lumens) | 40 450 | 60 800 | 75 1,100 | 100 1,600 |
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| Incandescent Light Bulb Wattage LED Equivalent Wattage | 100 Watt 10 Watt | 75 Watt 7.5 Watt | 60 Watt 6 Watt | 50 Watt 5 Watt |
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| Incandescent Light Bulb Wattage LED Equivalent Wattage | 100 Watt 10 Watt | 75 Watt 7.5 Watt | 60 Watt 6 Watt | 50 Watt 5 Watt |
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Similar to a dining room, your at-home office should have a brightness level of 3,000 to 6,000 lumens. Why? Because you’re continuously reading, writing and staring at a screen. Dim light in this area can cause you to strain your eyes, but anything too bright can also be a problem.
See PDF and complete foot candle index. For the average space of 250 square feet , you’ll need roughly 5,000 lumens as your primary light source (20 lumens x 250 square feet).
| Incandescent Light Bulb Wattage LED Equivalent Wattage | 75 Watt 7.5 Watt | 60 Watt 6 Watt | 50 Watt 5 Watt | 30 Watt 3 Watt |
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In other words, 3,000 lumens is meant to give a room a brighter light . This is not ideal if you have a small room and it’s a bedroom. You don’t want to blind your eyes when you’re about to go to bed. On the other hand, 2,000 lumens is ideal if you wish to light up a 200 square-foot living room.
To replace a 100 watt (W) incandescent bulb, look for a bulb that gives you about 1600 lumens .
100-watt bulb produces 1,600 lumens of light .
| Traditional bulb 1 Halogen 2 LED | 40 watts 25 watts 5 watts | 60 watts 40 watts 7 watts | 75 watts 45 watts 9 watts | 100 watts 60 watts 12 watts |
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A 3-watt LED bulb may produce anywhere between 240 to 320 lumens of illumination . Lumens is a measure of light. ‘Lumens per watt’ is the measure to identify how much light is produced for the energy or wattage drawn. Accordingly, the minimum efficiency of a 3 Watt LED bulb will be 80 lumens/watt.
For a 60-Watt fixture, you could use a 100W, 125W, or even 150W LED equivalent because they all consume under 60-Watts! ... That means you could use a 150W LED equivalent bulb in a 60W socket and get more than three times the brightness of your old 60-Watt incandescent bulb.
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