using osram 64623 in automotive application

[vinsanity286]

I am posting this here so I get more comments but mods please move to automotive lighting section if needed.

I am interested in using the osram 64623 as an auxilary highbeam light in my car. I have chosen this bulb for its excellent output vs. bulb life at the 14.4 volts it will be seing on a car. My concern is about the heat this bulb emits, 165 f at 14.5volts according the luxluthors excellent destructive incan bulb test. This does not seem to be a crazy high temperature to me but apparently it is enough to destroy aluminum mag reflectors. So is there a readily available reflector that I can use continuously. It will be on a moving vehicle so that may greatly help with cooling. I would like to keep the reflector as small as possible and was actually hoping to use the modamag m2 stippled reflector in a mag head.

Is it possible that the modamag reflector will survive with the car moving?

Thanks in advance!

 

[DocD]

Maybe try a set of HID spot light's or back engineer those bulbs into a good size spot light:thumbsup:
But you can buy 12volt 150watt halogen bulb for spot light maybe you could use those:thumbsup: just my own thought's good luck DocD

 

[vinsanity286]

Anyone?

 

[mdocod]

While I really can't comment much on the design idea.. I would like to take a quote LuxLuthors Destructive tests thread...

...a Fluke 179 using a thermistor probe positioned 4mm from bottom of bulb envelope to get relative bulb temps.

The important part of the quote has been emphasized.

By placing the temperature probe below the bulb, you can get an idea of radiated heat as it compares to other bulbs, it has nothing to do with how hot it could actually get near the bulb in a closed environment. In the testing, the bulb is in free air and most of the heat would be rising off the bulb, creating a convection cycle.

The temperature of a filament within any incandescent bulb regardless wattage is going to be burning at around 5000-6000+ degrees fahrenheit in order to produce light. The total heat energy given off by the bulb has to do with the total electrical energy (watts) that is being converted into heat. You can pretty much count on about 90% (very rough estimate and can vary depending on many factors) of the energy into an incandescent bulb being converted to heat.

Bottom line, if you have more watts, you usually have more heat to deal with.

The only reason i am making this point, is that the meaning of the "temperature testing" in LuxLuthors testings is VERY often misunderstood or incorrectly used to draw various conclusions.

Eric

 

[AzN1337c0d3r]

You will want to put the bulb and reflector into an enclosure to keep it weather-proof.

However, this will pose a challenge with cooling. You could try thermal epoxying the enclosure to the reflector.

Another thing I would point out is that car's electrical systems are very noisy and you may seek spikes of 40V+ sometimes. Not sure how the 64623 will stand up to something like that.