auroreboreale
Newly Enlightened
All:
I live North of 60 in Canada's Yukon territory, where a winter full of 19-hour long nights, is coming.
I bike year round, in the winter using an older 12V ni-cad battery bike helmet light system that uses overhead projector bulbs, one a 12W the other a 20W, for low and combined (32W) high beam. I believe that they are MR-11 bulbs with a lense built into the bulbs.
What I am seeking to replace is a 12Watt, 12 volt, Ushio #100618 FTB/FG overhead projector bulb. The battery pack is 10x1.4V nickel-cadmium 'C' cell batteries=14Volts.
I am beginning to run out of spares, so I wondered if I might be able to replace the MR-11 12W with a MR-11 LED bulb? As a drop-in replacement with no modifications?
What I need to know from you is whether or not a 15 LED MR-11 bulb rated for "7000mcd/LED" will match the lumens of what I am using now. (My Ushio bulb is not marked as to how many lumens!)
Also, will an LED MR-11 run on 14V DC? There is no regulation, so I guess it pretty quickly falls in voltage. I get about 3 hours burn time out of it.
Sage Lighting out of Vancouver, BC, Canada makes an MR-11 15 LED. Here's their skeletal website:
http://members.shaw.ca/sagelighting/led_spotlights_and_bulbs_specifi.htm
What do you think?
I am an artist so I hope to keep the cost low. I also need it to work at minus 40C/-40F. What I have got now works well.
Thanks for your help!
I live North of 60 in Canada's Yukon territory, where a winter full of 19-hour long nights, is coming.
I bike year round, in the winter using an older 12V ni-cad battery bike helmet light system that uses overhead projector bulbs, one a 12W the other a 20W, for low and combined (32W) high beam. I believe that they are MR-11 bulbs with a lense built into the bulbs.
What I am seeking to replace is a 12Watt, 12 volt, Ushio #100618 FTB/FG overhead projector bulb. The battery pack is 10x1.4V nickel-cadmium 'C' cell batteries=14Volts.
I am beginning to run out of spares, so I wondered if I might be able to replace the MR-11 12W with a MR-11 LED bulb? As a drop-in replacement with no modifications?
What I need to know from you is whether or not a 15 LED MR-11 bulb rated for "7000mcd/LED" will match the lumens of what I am using now. (My Ushio bulb is not marked as to how many lumens!)
Also, will an LED MR-11 run on 14V DC? There is no regulation, so I guess it pretty quickly falls in voltage. I get about 3 hours burn time out of it.
Sage Lighting out of Vancouver, BC, Canada makes an MR-11 15 LED. Here's their skeletal website:
http://members.shaw.ca/sagelighting/led_spotlights_and_bulbs_specifi.htm
What do you think?
I am an artist so I hope to keep the cost low. I also need it to work at minus 40C/-40F. What I have got now works well.
Thanks for your help!