LED Fogs!!!!!!!!!!!!!!!
LED Fogs!!!!!!!!!!!!!!!
Alright guys I got this crazy idea tonight to put some LED's in an extra set of fogs that I had, I dont think that this has been done before. It came out pretty good I still need to work on it a bit and get some brighter leds. The battery I was using to test the LED's was dying as well so they arnt as bright as they should be but you guys can get idea of what im doing here. Hopefully tomorrow ill wire up another set in a dif pattern.
Heres a few teaser pics...
Heres a few teaser pics...
Originally Posted by spdfreak
The light isn't very bright, but it's a bright idea!
good effort....I dont want to **** on your parade, but no matter how many 5mm LEDs you stuff in there you will have nothing more than cosmetic lights, with no real performance. This topic has been beat to death on hidplanets LED forum, the fact of the matter is the technology just isnt there yet.
If you are serios about this you need to invest in some luxeon k2s (below) about 8 will equal the output of a 55watt halogen, then you have to design a power source, you dont want to drive $6 a pop LEDs on just a resistor. Then there is the thermal managment issues, you will need to cram some heatsinks and fans behind the lights or else these will go into thermal runaway w/ in a few seconds. after all that there are the optics to consider.
If you are serios about this you need to invest in some luxeon k2s (below) about 8 will equal the output of a 55watt halogen, then you have to design a power source, you dont want to drive $6 a pop LEDs on just a resistor. Then there is the thermal managment issues, you will need to cram some heatsinks and fans behind the lights or else these will go into thermal runaway w/ in a few seconds. after all that there are the optics to consider.
What if I were to get some 10mm 130k mcd LED's you dont think that would throw enough light? I understand that this is more cosmetic than functional, but I would really like to see this work at least in some form...
i was sort of curios about this and did some reasearch, here are some #s for you to chew over.
-typical 21K mcd 5mm LED found on ebay w/ a 20 degree viewing angle fluxes 2 lumens
-typical 130K mcd 10mm LED found on ebay w/ a 12 degree viewing angle fluxes 4.5 lumens
-the luxeon k2's in the pic above, luxeon stars and nitchia jupiters flux 120 lumens
-a automotive halogen bulb has a output of 1000-1700 lumens depending on bulb type ( A H3 bulb puts out 1350 lumens)
-a 4300K D2R/S HID capsule puts out 3200 lumens
so to get somthing w/ a output simiar to a h3 bulb, per light, you would need a minimum of:
- 675 5mm LEDs, or
- 300 10mmm LEDs or
-11 luxeon stars or nitchia jupiters,these produce a huge amount of heat and keeping them cool in the space you will have to work w/ will be tough, to say the least. the luxeon K2s are the next generation and have higher operation temp when compared to the stars, but thermal managment would still be quite an undertaking.
so if you were to fill the housing with LEDs, here are some more #s
Inside diameter of the fog is about 3",so:
1 inch = 2.54 cm
3 x 2.54 = 7.26cm I.D of light
area = 3.14 x r^2
(7.26/2)^2 x 3.14 = 45.6 cm^2
a 5mm leds has a footprint of
.25^2 x 3.14 = .196 cm^2
45.6 /.196 = 232.7
so 232 5mm LEDs will fit, actualy less since they are round and will have some space between them no matter how you arrange them. so lets say at most 210 LEDs can be packed in there, thats 410 lumens, less than a signal bulb
a 10mm leds has a footprint of
.5^2 x 3.14 = .785cm^2
45.6 /.785 = 58.1
so maybee 50 10mm LEDs would fit and put out 225 lumens, less light than the 5mms much less than a signal bulb and nowhere near a H3 bulb,
a luxeon K2 (LXK2-PW14-U00 ) is a 7.35mm square, so:
.735 x .735 = .54 cm^2
45.6 / .54 = 84.4
you would be able to fit enough of the K2s in there to get you above the 1350 lumen mark, with room to spare. these are definatly the best prospect since they have the highest operation temp, (as compared to stars) and would allow tighter grouping, but thermal managment would still be an issue. the more you put in there, the hotter it will get and the more robust the cooling system will need to be.
so to sum it up, unless you want to invest a lot of time and effort making a set w/ luxeons, this will be a strictly cosmetic mod. you wont be able to use them for foward lighting, since the output at best would be similar to your parking lights.
-typical 21K mcd 5mm LED found on ebay w/ a 20 degree viewing angle fluxes 2 lumens
-typical 130K mcd 10mm LED found on ebay w/ a 12 degree viewing angle fluxes 4.5 lumens
-the luxeon k2's in the pic above, luxeon stars and nitchia jupiters flux 120 lumens
-a automotive halogen bulb has a output of 1000-1700 lumens depending on bulb type ( A H3 bulb puts out 1350 lumens)
-a 4300K D2R/S HID capsule puts out 3200 lumens
so to get somthing w/ a output simiar to a h3 bulb, per light, you would need a minimum of:
- 675 5mm LEDs, or
- 300 10mmm LEDs or
-11 luxeon stars or nitchia jupiters,these produce a huge amount of heat and keeping them cool in the space you will have to work w/ will be tough, to say the least. the luxeon K2s are the next generation and have higher operation temp when compared to the stars, but thermal managment would still be quite an undertaking.
so if you were to fill the housing with LEDs, here are some more #s
Inside diameter of the fog is about 3",so:
1 inch = 2.54 cm
3 x 2.54 = 7.26cm I.D of light
area = 3.14 x r^2
(7.26/2)^2 x 3.14 = 45.6 cm^2
a 5mm leds has a footprint of
.25^2 x 3.14 = .196 cm^2
45.6 /.196 = 232.7
so 232 5mm LEDs will fit, actualy less since they are round and will have some space between them no matter how you arrange them. so lets say at most 210 LEDs can be packed in there, thats 410 lumens, less than a signal bulb
a 10mm leds has a footprint of
.5^2 x 3.14 = .785cm^2
45.6 /.785 = 58.1
so maybee 50 10mm LEDs would fit and put out 225 lumens, less light than the 5mms much less than a signal bulb and nowhere near a H3 bulb,
a luxeon K2 (LXK2-PW14-U00 ) is a 7.35mm square, so:
.735 x .735 = .54 cm^2
45.6 / .54 = 84.4
you would be able to fit enough of the K2s in there to get you above the 1350 lumen mark, with room to spare. these are definatly the best prospect since they have the highest operation temp, (as compared to stars) and would allow tighter grouping, but thermal managment would still be an issue. the more you put in there, the hotter it will get and the more robust the cooling system will need to be.
so to sum it up, unless you want to invest a lot of time and effort making a set w/ luxeons, this will be a strictly cosmetic mod. you wont be able to use them for foward lighting, since the output at best would be similar to your parking lights.
Senior Member
Joined: Jul 2002
Posts: 2,835
Originally Posted by Dr. Roy
i was sort of curios about this and did some reasearch, here are some #s for you to chew over.
-typical 21K mcd 5mm LED found on ebay w/ a 20 degree viewing angle fluxes 2 lumens
-typical 130K mcd 10mm LED found on ebay w/ a 12 degree viewing angle fluxes 4.5 lumens
-the luxeon k2's in the pic above, luxeon stars and nitchia jupiters flux 120 lumens
-a automotive halogen bulb has a output of 1000-1700 lumens depending on bulb type ( A H3 bulb puts out 1350 lumens)
-a 4300K D2R/S HID capsule puts out 3200 lumens
so to get somthing w/ a output simiar to a h3 bulb, per light, you would need a minimum of:
- 675 5mm LEDs, or
- 300 10mmm LEDs or
-11 luxeon stars or nitchia jupiters,these produce a huge amount of heat and keeping them cool in the space you will have to work w/ will be tough, to say the least. the luxeon K2s are the next generation and have higher operation temp when compared to the stars, but thermal managment would still be quite an undertaking.
so if you were to fill the housing with LEDs, here are some more #s
Inside diameter of the fog is about 3",so:
1 inch = 2.54 cm
3 x 2.54 = 7.26cm I.D of light
area = 3.14 x r^2
(7.26/2)^2 x 3.14 = 45.6 cm^2
a 5mm leds has a footprint of
.25^2 x 3.14 = .196 cm^2
45.6 /.196 = 232.7
so 232 5mm LEDs will fit, actualy less since they are round and will have some space between them no matter how you arrange them. so lets say at most 210 LEDs can be packed in there, thats 410 lumens, less than a signal bulb
a 10mm leds has a footprint of
.5^2 x 3.14 = .785cm^2
45.6 /.785 = 58.1
so maybee 50 10mm LEDs would fit and put out 225 lumens, less light than the 5mms much less than a signal bulb and nowhere near a H3 bulb,
a luxeon K2 (LXK2-PW14-U00 ) is a 7.35mm square, so:
.735 x .735 = .54 cm^2
45.6 / .54 = 84.4
you would be able to fit enough of the K2s in there to get you above the 1350 lumen mark, with room to spare. these are definatly the best prospect since they have the highest operation temp, (as compared to stars) and would allow tighter grouping, but thermal managment would still be an issue. the more you put in there, the hotter it will get and the more robust the cooling system will need to be.
so to sum it up, unless you want to invest a lot of time and effort making a set w/ luxeons, this will be a strictly cosmetic mod. you wont be able to use them for foward lighting, since the output at best would be similar to your parking lights.
-typical 21K mcd 5mm LED found on ebay w/ a 20 degree viewing angle fluxes 2 lumens
-typical 130K mcd 10mm LED found on ebay w/ a 12 degree viewing angle fluxes 4.5 lumens
-the luxeon k2's in the pic above, luxeon stars and nitchia jupiters flux 120 lumens
-a automotive halogen bulb has a output of 1000-1700 lumens depending on bulb type ( A H3 bulb puts out 1350 lumens)
-a 4300K D2R/S HID capsule puts out 3200 lumens
so to get somthing w/ a output simiar to a h3 bulb, per light, you would need a minimum of:
- 675 5mm LEDs, or
- 300 10mmm LEDs or
-11 luxeon stars or nitchia jupiters,these produce a huge amount of heat and keeping them cool in the space you will have to work w/ will be tough, to say the least. the luxeon K2s are the next generation and have higher operation temp when compared to the stars, but thermal managment would still be quite an undertaking.
so if you were to fill the housing with LEDs, here are some more #s
Inside diameter of the fog is about 3",so:
1 inch = 2.54 cm
3 x 2.54 = 7.26cm I.D of light
area = 3.14 x r^2
(7.26/2)^2 x 3.14 = 45.6 cm^2
a 5mm leds has a footprint of
.25^2 x 3.14 = .196 cm^2
45.6 /.196 = 232.7
so 232 5mm LEDs will fit, actualy less since they are round and will have some space between them no matter how you arrange them. so lets say at most 210 LEDs can be packed in there, thats 410 lumens, less than a signal bulb
a 10mm leds has a footprint of
.5^2 x 3.14 = .785cm^2
45.6 /.785 = 58.1
so maybee 50 10mm LEDs would fit and put out 225 lumens, less light than the 5mms much less than a signal bulb and nowhere near a H3 bulb,
a luxeon K2 (LXK2-PW14-U00 ) is a 7.35mm square, so:
.735 x .735 = .54 cm^2
45.6 / .54 = 84.4
you would be able to fit enough of the K2s in there to get you above the 1350 lumen mark, with room to spare. these are definatly the best prospect since they have the highest operation temp, (as compared to stars) and would allow tighter grouping, but thermal managment would still be an issue. the more you put in there, the hotter it will get and the more robust the cooling system will need to be.
so to sum it up, unless you want to invest a lot of time and effort making a set w/ luxeons, this will be a strictly cosmetic mod. you wont be able to use them for foward lighting, since the output at best would be similar to your parking lights.
Looks like you gave him a full plate to chew on. That's a whole lotta LEDs to cram into a foglight housing.
Originally Posted by Dr. Roy
i was sort of curios about this and did some reasearch, here are some #s for you to chew over.
-typical 21K mcd 5mm LED found on ebay w/ a 20 degree viewing angle fluxes 2 lumens
-typical 130K mcd 10mm LED found on ebay w/ a 12 degree viewing angle fluxes 4.5 lumens
-the luxeon k2's in the pic above, luxeon stars and nitchia jupiters flux 120 lumens
-a automotive halogen bulb has a output of 1000-1700 lumens depending on bulb type ( A H3 bulb puts out 1350 lumens)
-a 4300K D2R/S HID capsule puts out 3200 lumens
so to get somthing w/ a output simiar to a h3 bulb, per light, you would need a minimum of:
- 675 5mm LEDs, or
- 300 10mmm LEDs or
-11 luxeon stars or nitchia jupiters,these produce a huge amount of heat and keeping them cool in the space you will have to work w/ will be tough, to say the least. the luxeon K2s are the next generation and have higher operation temp when compared to the stars, but thermal managment would still be quite an undertaking.
so if you were to fill the housing with LEDs, here are some more #s
Inside diameter of the fog is about 3",so:
1 inch = 2.54 cm
3 x 2.54 = 7.26cm I.D of light
area = 3.14 x r^2
(7.26/2)^2 x 3.14 = 45.6 cm^2
a 5mm leds has a footprint of
.25^2 x 3.14 = .196 cm^2
45.6 /.196 = 232.7
so 232 5mm LEDs will fit, actualy less since they are round and will have some space between them no matter how you arrange them. so lets say at most 210 LEDs can be packed in there, thats 410 lumens, less than a signal bulb
a 10mm leds has a footprint of
.5^2 x 3.14 = .785cm^2
45.6 /.785 = 58.1
so maybee 50 10mm LEDs would fit and put out 225 lumens, less light than the 5mms much less than a signal bulb and nowhere near a H3 bulb,
a luxeon K2 (LXK2-PW14-U00 ) is a 7.35mm square, so:
.735 x .735 = .54 cm^2
45.6 / .54 = 84.4
you would be able to fit enough of the K2s in there to get you above the 1350 lumen mark, with room to spare. these are definatly the best prospect since they have the highest operation temp, (as compared to stars) and would allow tighter grouping, but thermal managment would still be an issue. the more you put in there, the hotter it will get and the more robust the cooling system will need to be.
so to sum it up, unless you want to invest a lot of time and effort making a set w/ luxeons, this will be a strictly cosmetic mod. you wont be able to use them for foward lighting, since the output at best would be similar to your parking lights.
-typical 21K mcd 5mm LED found on ebay w/ a 20 degree viewing angle fluxes 2 lumens
-typical 130K mcd 10mm LED found on ebay w/ a 12 degree viewing angle fluxes 4.5 lumens
-the luxeon k2's in the pic above, luxeon stars and nitchia jupiters flux 120 lumens
-a automotive halogen bulb has a output of 1000-1700 lumens depending on bulb type ( A H3 bulb puts out 1350 lumens)
-a 4300K D2R/S HID capsule puts out 3200 lumens
so to get somthing w/ a output simiar to a h3 bulb, per light, you would need a minimum of:
- 675 5mm LEDs, or
- 300 10mmm LEDs or
-11 luxeon stars or nitchia jupiters,these produce a huge amount of heat and keeping them cool in the space you will have to work w/ will be tough, to say the least. the luxeon K2s are the next generation and have higher operation temp when compared to the stars, but thermal managment would still be quite an undertaking.
so if you were to fill the housing with LEDs, here are some more #s
Inside diameter of the fog is about 3",so:
1 inch = 2.54 cm
3 x 2.54 = 7.26cm I.D of light
area = 3.14 x r^2
(7.26/2)^2 x 3.14 = 45.6 cm^2
a 5mm leds has a footprint of
.25^2 x 3.14 = .196 cm^2
45.6 /.196 = 232.7
so 232 5mm LEDs will fit, actualy less since they are round and will have some space between them no matter how you arrange them. so lets say at most 210 LEDs can be packed in there, thats 410 lumens, less than a signal bulb
a 10mm leds has a footprint of
.5^2 x 3.14 = .785cm^2
45.6 /.785 = 58.1
so maybee 50 10mm LEDs would fit and put out 225 lumens, less light than the 5mms much less than a signal bulb and nowhere near a H3 bulb,
a luxeon K2 (LXK2-PW14-U00 ) is a 7.35mm square, so:
.735 x .735 = .54 cm^2
45.6 / .54 = 84.4
you would be able to fit enough of the K2s in there to get you above the 1350 lumen mark, with room to spare. these are definatly the best prospect since they have the highest operation temp, (as compared to stars) and would allow tighter grouping, but thermal managment would still be an issue. the more you put in there, the hotter it will get and the more robust the cooling system will need to be.
so to sum it up, unless you want to invest a lot of time and effort making a set w/ luxeons, this will be a strictly cosmetic mod. you wont be able to use them for foward lighting, since the output at best would be similar to your parking lights.
the leds have to be angled to shine at the reflector as well, in order to produce a good "stream" of light to shine out. the reflector consentrates the light to make it into a usable light sourse. have you considered using at least some of the leds at an agle, to shine into the reflector?
yeah I thought about that, but the problem would be that the board would block the reflection dont you think. Once I get the whole thing figured out it will be recessed pretty far back in the housing where I dont think that reflection will be a problem. I also plan on painting the board on the finished product with some type of chorme pain so that it can reflect at least a little.
Member
Joined: Mar 2006
Posts: 71
ow my brain. anyway all I know about LED's are that they "look" brighter looking at the bulb rather than creating a lit area. it takes a very stong led to create what a normal halogen bulb could easily create. the lumen # is way higher on led's though, which is good for beacons, running lights, can be seen for long distances in a small unit. Led's have come a long way, its always neat to see where they show up next! cool fogs!
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