D
David Williams
- Jan 1, 1970
- 0
-> Sunlight = 100,000 lumens/m^2
-> Halogen bulbs yield 16 to 24 lumens/W
-> That's 6250 to 4167 W to produce 1m^2 of sunlight
-> 250 to 167 W to illuminate my 20cm square
-> That just seems awfully low; am I missing something?
It looks pretty reasonable to me. If you look straight into a 200-watt
halogen spotlight, with a radius of 10 cm or so, it's pretty damned
bright! It would certainly be comparable with a white surface directly
illuminated by sunlight.
dow
-> Halogen bulbs yield 16 to 24 lumens/W
-> That's 6250 to 4167 W to produce 1m^2 of sunlight
-> 250 to 167 W to illuminate my 20cm square
-> That just seems awfully low; am I missing something?
It looks pretty reasonable to me. If you look straight into a 200-watt
halogen spotlight, with a radius of 10 cm or so, it's pretty damned
bright! It would certainly be comparable with a white surface directly
illuminated by sunlight.
dow
