WebLightMeter.com logo and graph key
Your chosen day(s) shown here

What's this site about?
This is the world's first online light meter www.weblightmeter.com. Visit us anytime if you want to see how much light there is today.

Why do I want to know?
If you are interested in SAD and light you now have the chance to see how much light there is around and what it looks like.

Where is the light measured?
The sensor is in Cambridge, UK. For our global visitors, the current date and time in Cambridge is 07:58 on Fri 21st November.

Here is the current view from the BBC webcam located on Cambridge University library about 3 km (2 miles) from the weblightmeter.

webcam picture loading, please wait...

 You may look at historical records (what was your birthday like?) and also look at the patterns over a week or a month.
Our data goes back to 9th March 2002 (with a few breaks for downtime).

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<<<  Nov 2008  >>>

Number of days
1 7 28

What are lux?
Lux is the unit of measure most often used to measure light. (The USA still measure in foot-candle*, 2500lux = 26900 foot-candle). Here are some typical lux figures:
  • moonlight - <1lux
  • living room indoors at night (in front of the TV) - 50lux
  • well lit kitchen or office - 500lux
  • turn your car lights on in the middle of the day so other people see you coming - 1000lux
  • MINIMUM to treat SAD (typically in 2hours) - 2500lux
  • clear spring morning, 30 minutes after sunrise in UK (also High Speed 30minute SAD treatment light)- 10,000lux
  • bright summers day in UK - 50,000lux
  • a high mountain in Kenya (on the equator) at midday - >100,000lux

* As Prof Brainard of Philadelphia says "The USA is making genuine progress towards metrication, it takes time but we are getting there - inch by inch"

 

Links page (sunshine hours, equinox explained, SAD forecast and more besides)

www.weblightmeter.com Another first from Outside In (www.outsidein.co.uk) Europe's leading specialist company in lights for SAD, Jetlag, Late Risers, Sleep Pattern and other bodyclock problems.

OUTSIDE IN (Cambridge) Ltd.
3 The Links, Trafalgar Way, Bar Hill, Cambridge, CB3 8UD
Tel: +44 (0)1954 780 500   Fax: +44 (0)1954 780 510
Email:  info@outsidein.co.uk

logo (4K)
© 2002 Outside In
Last updated: February 10 2006 15:23:31
www.weblightmeter.com
 Technical development and hosting of the weblightmeter by Precedence Technologies: www.precedence.co.uk.