Converting from W to W/m^2 for UV bulbs

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In summary, the speaker is looking for a way to determine the W/m2 of a 300 W UV bulb without purchasing a $3k radiometer. They plan to use the bulb for an experiment involving irradiating cells. One suggestion is to calculate the emitting surface area of the bulb and divide it by the power, but this may not be accurate due to conversion efficiency. The best solution is to contact the manufacturer, Osram, for the specifications or search their website for a data sheet.
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Leigh
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I have a 300 W UV bulb (http://www.bulborama.com/300R-E27-ULTRA-VITALUX-OSRAM-SUN-LAMP-TANNING-BULB-230-VOLTS-300-WATTS-p711.html).

I am trying to determine the W/m2 without buying a $3k radiometer.

I will be using this bulb to irradiate cells during a protection experiment.

Thank you very much for your help!
 
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Leigh said:
I have a 300 W UV bulb (http://www.bulborama.com/300R-E27-ULTRA-VITALUX-OSRAM-SUN-LAMP-TANNING-BULB-230-VOLTS-300-WATTS-p711.html).

I am trying to determine the W/m2 without buying a $3k radiometer.

I will be using this bulb to irradiate cells during a protection experiment.

Thank you very much for your help!

You can get an upper bound by simply calculating the emitting surface area of the bulb and dividing into the power. And hopefully the limitations of this are obvious: the conversion efficiency is not 100% so the actual number must be lower than this number. Possibly a lot lower.

The best answer is to call up Osram and ask them for the spec. Or scour their website for a detailed data sheet which likely has the spec or something from which it could be derived. Cost of a phone call or two with some of your time.
 
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BTW:

OSRAM SYLVANIA INC.
100 Endicott Street Danvers, MA 01923 Phone: +1-978-777-1900 www.sylvania.com
 

FAQ: Converting from W to W/m^2 for UV bulbs

What is the difference between W and W/m^2 for UV bulbs?

W stands for watts, which is a measure of power. W/m^2 stands for watts per square meter, which is a measure of irradiance or the amount of power per unit area. When converting from W to W/m^2 for UV bulbs, you are essentially converting from total power output to power output per unit area.

Why is it important to convert from W to W/m^2 for UV bulbs?

Converting from W to W/m^2 is important because it allows us to compare the power output of UV bulbs with different sizes or shapes. It also helps us determine the appropriate distance between the UV bulb and the target surface for effective UV exposure.

How do you convert from W to W/m^2 for UV bulbs?

To convert from W to W/m^2 for UV bulbs, you need to know the surface area of the bulb. Then, simply divide the power output in watts by the surface area in square meters. The resulting value will be in W/m^2.

Can you convert from W/m^2 to W for UV bulbs?

Yes, you can convert from W/m^2 to W for UV bulbs by multiplying the irradiance value in W/m^2 by the surface area in square meters. The resulting value will be in watts.

Are there any other units used for measuring UV bulb power output?

In addition to watts and W/m^2, another commonly used unit for measuring UV bulb power output is milliwatts (mW). 1 watt is equal to 1000 milliwatts. This unit is often used for smaller UV bulbs or for more precise measurements.

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