davidefromitaly
Enlightened
finally i have do a overdrive test on the new osram irc series...
first of all i have test them with 3 li-ion cells (D size so low voltage drop) and consider the output 100%
then with 4 cells: output 249%
with 5 cells: 460%
this mean that the ususal table for calculate overdrive remain correct, so with 5 cells the efficiency reach 60lm/w!!!!! more than some hid lamps... incredible!!!!
the lamp life is over 4000 hours with 3 cells, 400 hours with 4 and 30h with 5 cells. the cost of the lamp is around 5$ in germany (plus shipping fees etc...)... quite cheap
here a image of the lamps http://digilander.libero.it/cuxdavide/osram irc.jpg
you can see that the filament is axial, only the glass is slightly frosted and can affect the beam, maybe is a problem of my lamps and others are more clear, i hope so...
osram produce 4 wattage of this lamps: 25, 35, 50, 65W
the 25W is the less efficient overall, the 35 and 65W the more efficient.
the 35W with 5 cells drain around 68W and output 4000 lumens
the 65W with 5 cells drain around 125W and output 7500-8000 lumens
first of all i have test them with 3 li-ion cells (D size so low voltage drop) and consider the output 100%
then with 4 cells: output 249%
with 5 cells: 460%
this mean that the ususal table for calculate overdrive remain correct, so with 5 cells the efficiency reach 60lm/w!!!!! more than some hid lamps... incredible!!!!
the lamp life is over 4000 hours with 3 cells, 400 hours with 4 and 30h with 5 cells. the cost of the lamp is around 5$ in germany (plus shipping fees etc...)... quite cheap
here a image of the lamps http://digilander.libero.it/cuxdavide/osram irc.jpg
you can see that the filament is axial, only the glass is slightly frosted and can affect the beam, maybe is a problem of my lamps and others are more clear, i hope so...
osram produce 4 wattage of this lamps: 25, 35, 50, 65W
the 25W is the less efficient overall, the 35 and 65W the more efficient.
the 35W with 5 cells drain around 68W and output 4000 lumens
the 65W with 5 cells drain around 125W and output 7500-8000 lumens