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When I was researching them (several years ago now) the only key thing that everyone agreed on is that they have to be really honkin' bright, with 10000 lux at
by jtolmar 11y ago
When I was researching them (several years ago now) the only key thing that everyone agreed on is that they have to be really honkin' bright, with 10000 lux at 2 feet being the standard. You'll need even brighter bulbs for your scheme, since you'll be placing them further away. It's an inverse square relationship, so at 6 feet you'll need a 9x as bright bulb.
- jerf 11y agoInverse square applies to a light emanating perfectly spherically that isn't bouncing from anything else. If your room doesn't have dark walls, you will need much less than the inverse square law would suggest. Similarly, if you apply the "inverse square" law to sound waves as if they are emanating in a perfect sphere from our mouths, it's pretty easy to show that you'll never hear anybody very well, even shouting at the top of their lungs, from even a few dozen feet away. However, between the fact that our voices are partially directional and the fact that we pretty much always have a floor of some kind and are often in rooms that provide even greater constraints, we are rarely in situations where inverse square actually applies to our audio.