Electricity and Energy Terms – J, kW, kWh, Lm/W – LED Lights

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Understanding the terminology of energy is key to picking out efficient lighting. A great resource for learning about this topic would be Understanding Energy-Efficient Lighting, where you can find five ways that lighting impacts your electric bill and 10 different types of bulbs on offer! This article will help provide clarity around some complicated concepts like watts/hour or lumens per watt so it’s worth reading if Efficiency amazes you as much as it does us here at Sustainable Enterprises Incorporated There are four main metrics when choosing an eco friendly light source: joules (J), wattage(W)watt hours(Whr).

Joules (J):

The Joule is the SI (International System of Units) unit for measuring energy. It’s defined as 1 joule equaling to 1 kilogram-meters squared per second squared . If you’re looking at lighting efficiency, what really matters are how many total joules were consumed versus light out put; your goal should always be maximize effective output while minimizing consumption in this regard!

Kilowatts (kW): and Watts (W)

Watts are the SI unit of power. kilowatts are equivalent to 1,000 watts and they’re used in many fields because it measures electrical energy over time- though not always accurately! A watt represents how much heat an electric device produces per second while being turned on which means 60W bulbs could give off light with only 40% efficiency (40/60).

Watts and kilowatts are two very common units used to measure power. Watts (W) measures the rate at which energy is transferred, while kW stands for “kilowatt hours.” One watt can change a force of one newton into motion – so it’s like having horsepower! A microprocessor needs 1/1000th or 100 milliwatts (mw) as its input; this small amount would have no visible effect on anything but you’d feel some tingling around your fingers if they happened upon an exposed wire containing just enough currents from different sources coming together in exactly right places.


The same amount of energy is used to light up 100 5W bulbs instead. You are only wasting 12.5% as much by using 4000 watts with one hundred 40W lights, which means a savings in power consumption at 87%, almost twice what was anticipated!

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

A unit of energy referred to as a watt-hour or kilowatt hour, it’s the amount used per hour for one household. This can be translated into how long an incandescent light bulb would last on your electric meter if left constantly lit without interruption over 24 hours

The term “WATT HOUR (Wh)” has been replaced with “KILOWATTH(kW h).”


If you’re looking for an energy efficient light bulb that can last more than 1,000 hours on just 4 watts of power then the Pathlight 120W Equivalent LED Incandescent A19 Wall Mounted Lamp is perfect. This Phillips-certified product has been developed by LumiBrite Lighting in partnership with General Electric and features innovative optics to emit rich colors while consuming only 3.4 units per day! It also comes standard with a 5 year warranty so customers know they’ll get their money back if anything ever goes wrong down the line – talk about peace of mind when buying quality products from reputable brands like ours!”

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