Are friend interested in one energy reliable lighting systems for your organization, business, or facility?

Picking the most effective lighting starts through a thorough expertise of power terminology together it relates to electricity. The four large measures you must be aware of are Joules, Watts, Watt-Hours, and Lumens/Watt. We"ll break them down one at a time below.

You are watching: How many joules of energy are in one kilowatt hour

Joules (J):

Joules space the SI (International mechanism of Units) unit the energy. They are characterized as 1 Joule = 1 kg·m2/s2. If you’re pertained to with energy performance in lighting, what you’re yes, really trying to perform is to minimization the total variety of Joules girlfriend consume when maximizing the efficient light output.

Watts (W) and Kilowatts (kW):

Watts room the SI unit the power. Kilowatts are tantamount to 1,000 Watts and also are the most generally used unit of electrical power. Power in basic is characterized as power over time. Watt are characterized as 1 Watt = 1 Joule per 2nd (1W = 1 J/s) which method that 1 kW = 1000 J/s. A Watt is the amount of power (in Joules) that an electrical an equipment (such as a light) is burn per second that it’s running. Therefore a 60W bulb is burn 60 Joules of power every 2nd you have actually it rotate on. In return, you acquire a details amount the light, also known as luminance. For an ext on luminance and also an even much more important measure (foot-candles), read here.

Example: If a room has one hundred 40W light bulbs to run at once, you room using 4000 watts (4000 Joules/second). Imagine acquiring the exact same (or better) lighting high quality by using one hundred 5W lamp instead. Now you’re just burning 500 watts. That’s only 12.5% together much power as girlfriend were making use of before; a save of 87.5%!

Watts are an essential part of arising your project and product criteria- learn an ext here!

Watt-Hours (Wh) and Kilowatt-Hours (kWh):

Imagine you have your 60 Watt pear on for an entire hour. Enter a new, and sometimes confuse term, “Watt-hours.” because you ran a 60 Watt bulb for 1 hour, you have used 60 Watt-hours that energy (not power). If the owner of a big building (such together a manufacturing facility or genuine estate development) is make the efforts to minimize their energy footprint, they want to minimization the number of Watt-hours they room burning transparent a provided 24 hour period. This is the exact same thing together saying they want to minimization the number of Joules they room consuming; the is merely a different, an ext common unit the measurement. 1 Watt-hour is same to 3600 Joules (3.6kJ). One Kilowatt-Hour is the exact same as 1,000 Watt-hours and is the most typical unit used in electric energy consumption.


This is a unit the measurement because that a term called luminous efficacy (you have the right to read about it in detail here). Luminous efficacy is a amount that defines the amount of illumination (lumens) the you get for a offered amount of strength (watts). Every else being equal, you desire to maximize lumens while minimizing the power compelled to produce them.

See more: Where Is The Roblox Hq Located, Roblox Corporation

Different devices require different amounts of power to do them run. In addition, different gadgets emit a various quantity and also quality of light for a offered power setting. Other significant considerations include off-the-shelf price, lifespan, and maintenance/replacement costs. For a more in-depth conversation on the many energy efficient lighting solutions, visit united state at Stouch lighting or try our ROI calculator. We’re below to help!