So I what a cheap and bright light for my bicycle. Came across a mod where an Mr-16 bulb was used. I know these bulbs are pretty cheap 5-10 dollars. Should I even consider building a light using these bulbs. I was planing on using a 50 watt bulb so I would be looking at an output of 500+ lumens? Can these bulbs be driven directly or would I need a driver? I have a 12v 5a lead acid battery for this mod.
Mr-16 Halogen bike light
- Thread starter holdthat1
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AnAppleSnail
Flashlight Enthusiast
At that output you won't get an hour's runtime. There's an effect with SLAs where higher draw lops off effective amp-hours. It should work; grab an MR-16 on sale at home depot and run it across the batter. Cheap indeed, 12-15 lumens per watt
BrianMc
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You are far from the first. You may find this thread and forum it is in a lot of help:
http://forums.mtbr.com/showthread.php?t=245737&highlight=Pond+Scum+light
http://forums.mtbr.com/showthread.php?t=245737&highlight=Pond+Scum+light
AnAppleSnail
Flashlight Enthusiast
I don't know the MR-16 very well, but I'm pretty sure it won't matter which pin is +.
At that output you won't get an hour's runtime. There's an effect with SLAs where higher draw lops off effective amp-hours. It should work; grab an MR-16 on sale at home depot and run it across the batter. Cheap indeed, 12-15 lumens per watt
Ok I miss read this post. Your saying the sla's are bad for this project and not my choice of bulb. Maybe I should use some Nimh of Lion's for this project.Brian thanks for the link. Helped out alot :twothumbs
a note to be taken .... when yr MR16 gets dim, then its time to switch off ... u do not wan to drain yr sla or any rechargables .....
happy modding!
do search in the fourms ... on batteries, battery tech .... Vast info around .....
happy modding!
do search in the fourms ... on batteries, battery tech .... Vast info around .....
Last edited:
TorchBoy
Flashlight Enthusiast
That's for a non-halogen bulb. http://en.wikipedia.org/wiki/Luminous_efficacy indicates 24 lm/W for a 12 V halogen bulb.Cheap indeed, 12-15 lumens per watt
BrianMc
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Pins are equivalent. You can mount them either way into sockets in landscape lights, for instance.
