Before, bulbs used higher watts to produce a brighter light. This was before we knew how to make brighter lights without increasing the energy consumption of the bulb. Today, we use lumens to determine brightness because the wattage does not change significantly enough to measure.
450 lumens is about the same brightness as a 40 watt bulb, 800 lumens is about the same as a 60 watt bulb, 1100 lumens compares to 75 watts, and 1600 lumens is roughly the same as a 100 watt bulb.
Kelvins measure the temperature and color of light. Higher kelvins indicate a brighter, cold white color while lower numbers indicate warm with a yellow tint.
This is measured in lumens per watt. The lower the lumens per watt, the more energy the bulb will burn. LED lights use the least energy with approximately 101 lumens per watt while incandescent bulbs create about 12.5 lumens per watt.
Using those calibers, we can determine about how bright a light will be when we compare lumens and wattage. This is a good thing to keep in mind if you have light sensitivity or if you are trying to brighten up a very dark space.
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