dyochambaz
Newly Enlightened
- Joined
- Feb 16, 2014
- Messages
- 13
How is it that an H1 automotive bulb, introduced in 1962, outputs ~1550 lumens, but a "75-watt equivalent, 53-watt actual" household halogen incandescent bulb, only recently widely available (in the US, at least), outputs roughly one-half to two-thirds the amount of light?
http://en.wikipedia.org/wiki/H1_lamp
http://www.homedepot.com/p/Philips-...-24-Pack-226969/203267693?N=5yc1vZc8geZ2bcoqt
http://en.wikipedia.org/wiki/H1_lamp
http://www.homedepot.com/p/Philips-...-24-Pack-226969/203267693?N=5yc1vZc8geZ2bcoqt