Light Bulb Facts | watts, lumens, kelvin, color temperature, and more!

Lumens, watts, kelvin, color temperature, life hours, etc. In this video, we're going to cover some essential lighting lingo!
Link to my Patreon page: https://www.patreon.com/Belinda_Carr
Chapters
0:00 Introduction
0:26 Watts
0:53 Lumens
1:36 Yearly energy cost
2:01 Life hours
2:33 Color temperature
3:30 Color accuracy
4:00 Energy efficiency
4:49 Dimmable
5:18 Enclosed Indoor Outdoor
5:59 Base and bulb sizes

Watt is a unit of power which is energy consumption divided by time. So, a 40 watt bulb will use 40 Joules per second. However LED bulbs which use less electricity usually say replacement, which means that it will only use 5.5 watts or 5.5 joules per second to give you the same brightness as a traditional 40 watt bulb.

Lumens is the measure of brightness or amount of visible light generated. A higher number means a brighter light. This small bulb gives off only 460 lumens while this large, brighter flood light gives off 1750 lumens. LED lights can produce more lumens at lower watts which means that they are brighter while using less power.

Lumens per watt or efficacy is the total light output divided by the total power input. For this candelabra bulb, it’s 515 lumens divided by 5 watts or 103. The higher the efficacy rating, the less it will cost to use it.

Estimated yearly energy cost is based on a 3 hour per day usage and a 11 center per kilo watt hour cost. Be sure to check your local rate for a more accurate number. While energy costs 11.71 cents per kwh in Texas, it’s 31 cents per kwh in Hawaii.

Life hours is the average life of a bulb as determined by engineering testing and probability analysis. A traditional 40-watt incandescent, 500-lumens light bulb has 1,500 life hours. An equivalent CFL provides 10,000 life hours and an equivalent LED typically provides 25,000 life hours.

Color temperature is expressed in Kelvin usually ranging from 2000 kelvin or candle light to 10000 kelvin or a blue sky.
2700 Kelvin is a yellow, warm, calming and inviting light given off by incandescent and high pressure sodium bulbs. It’s used in homes and restaurants.
3500K is a cool white light given off by halogen bulbs. It’s used in offices, receptions, and supermarkets.
4000K is a natural white light given off by metal halide bulbs.
4800K is the color temperature of direct sunlight.
5000K is a crisp, cool blue-ish daylight. It’s used in garages, security lighting, jewelry display cases and warehouses.
7000k is a cold white light.
10,000 kelvin is a cold, blue light used above aquariums.

Color accuracy, color rendering index or CRI is the effect of a light source on the color appearance of illuminated objects. It’s rated on a scale of 1 to 100 with 100 being the most accurate and 1 being the least. Incandescent light bulbs typically are 100 CRI, CFL light bulbs are 82-88 CRI, and LED light bulbs can range from 65 to 90 CRI.

All these CREE light bulbs have an energy star certification which means that they meet strict energy efficiency guidelines set by the US Environmental Protection Agency. They use 90% less energy than standard bulbs, they last at least 15 times longer and save about $50 in electricity costs over its lifetime. Title CA20 are regulations set by the California Energy Commission in order to reduce the amount of energy consumed by lighting products.

Dimmable light bulbs can change the lumens or brightness if used with a compatible dimmer switch. Using a non-dimmable bulb in a dimmable circuit can damage both the lamp and the circuit. All incandescent and halogen bulbs work with nearly every dimmer switch and can be dimmed completely.

Enclosed use indicates whether the bulb can be encased in a way that doesn’t have proper airflow or ventilation. Heat is the enemy of LED light bulbs. If the LED chips overheat, they can shorten the lifespan of the bulb. An indoor and outdoor label means that the bulb can be used in both instances. It can handle damp or wet conditions.

The last 2 things we’re going to discuss are the base and bulb sizes. There are many different types of bulb bases, the most common is called an Edison Screw or ES base. There are also many different light bulb shapes and sizes. The numbers that follow refer to the diameter of the bulb or lamps in eighths of an inch. For example, an A19 bulb is a teardrop shape bulb which is 19/8” or 2 ⅜” in diameter. A T8 tube is 8/8” or 1” in diameter.
--------------------
Fluffy by Smith The Mister https://smiththemister.bandcamp.com
Smith The Mister https://bit.ly/Smith-The-Mister-YT
Free Download / Stream: https://bit.ly/stm-fluffy
Music promoted by Audio Library https://youtu.be/OM9G3nyLT_w
---------------------
Disclaimer: This video was created for educational/informational purposes and qualifies as Fair Use.
#lightbulbs #lighting #led #lumen #watt #lingo #lightingfacts #diy #diybuild #homerenovation #home #science #kelvin #colortemperature

Видео Light Bulb Facts | watts, lumens, kelvin, color temperature, and more! канала Belinda Carr