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

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SUMMARY

The discussion focuses on converting the output of a 300 W UV bulb to W/m² for use in cell irradiation experiments. Participants suggest calculating the emitting surface area of the bulb and dividing the power output to estimate W/m², while noting that this method provides an upper bound due to conversion efficiency being less than 100%. The most reliable approach is to contact OSRAM directly for specific data sheets or specifications regarding the bulb's output.

PREREQUISITES
  • Understanding of UV bulb specifications and applications
  • Basic knowledge of power output calculations
  • Familiarity with irradiance concepts in photobiology
  • Ability to interpret technical data sheets
NEXT STEPS
  • Research how to calculate irradiance from power output and surface area
  • Contact OSRAM for detailed specifications on the 300 W UV bulb
  • Explore alternative methods for measuring UV output without expensive equipment
  • Learn about the effects of UV irradiation on cell cultures
USEFUL FOR

This discussion is beneficial for researchers in photobiology, laboratory technicians working with UV light, and anyone involved in experiments requiring precise UV irradiation measurements.

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
 

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