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470 Lumens to watts is typically 5 watts using LED, but is dependent on the efficiency of the light source.

The outdated metric of using wattage to judge brightness is over, as LED lights use less power to produce the same amount of lumens and can differ according to design. So a new comparison needs to be made.

To known what is 470 lumens in watts, use each light source’s watts to lumens efficacy. Common examples are:

**40 Watts**with Tungsten Incandescent**5.28 Watts**with LED**6.27 Watts**with CFL

Not all LEDs require the same amount of power to create the same light output. Here are some example products and their corresponding wattages:

A 470 lumens A19 2700K LED bulb will use **4.23 Watts** @ 111 lm/W

A 470 lm LED Spot GU10 2700K PAR16 uses **5.05 Watts** @ 93 lm/W

A 470 lumens B10 E12 Clear 2700K LED bulb will use **3.98 Watts** @ 118 lm/W

A E12 base LED golf ball bulb will use **3.4 Watts **@ 117 lm/W

A 470 lumen 3000K polycarbonate recessed ceiling light requires **5.66 Watts** @ 83 lm/W

A recessed ceiling can light with an 470 lumen output requires **6.53 Watts** @ 72 lm/W

A 4.8 W/m 70 LED 3000K strip will use **4.95 Watts** to create 470 lm @ 95 lm/W

As *lumens measure the amount of light* and *watts the amount of power* used to create that light, the only accurate way to calculate the power consumption in Watts, is to know how efficient the light source is.

To convert 470 lumens to Watts, we first need to know the efficacy of the light source.

Efficacy is a measure of how well a light source produces visible light. It is measured in lumens per watt (lm/W) or light output per watt.

A higher efficacy means more light for the same amount of power, with different light types and even different models within a light type varying quite a bit.

For reference, here are some average lm/W efficacies for various light types:

- Compact Fluorescent Lights (CFLs): 60-90 lm/W
- Tungsten Incandescent Lights: 12 lm/W
- LED Lights: 50 lm to 250 lm/W (varies widely by LED)

So now a more accurate lumens to watts calculation is required to find out how much power your LED light will consume.

The power in watts (W) is equal to the luminous flux in lumens (lm), divided by the luminous efficacy in lumens per watt (lm/W):

Watts = Lumens / Efficiency

For example, an LED with an efficiency of 75 lumens per watt would require *5.53* watts to produce 470 lumens.

*470 lumens / 85 lumens per watt = 5.53 watts*

Andrew Orange, the owner of Orange Lighting qualified and worked as an interior designer in 1993 before specialising in lighting working on high profile projects based in London. Since starting Orange Lighting Ltd in 2003 he has been sharing his knowledge and unique teaching style mostly to his designer clients, offering practical real life advice born from running a busy consultancy and lighting supply business. Launching in 2020, his blog has evolved into Quick & Easy Lighting, curating some 25 years design experience into making the lighting choice and design process achievable and easy to understand for all.

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