LED Corn Cob lamp

N

nizak

Senior Member
On many occasions I’ve seen where Edison base corn cob style led lamps are used in HID fixtures.

Is this a common practice to use a Mogul adapter and then use the cob in place of a HPS , Metal Halide, or Mercury vapor lamp?

Would voltage output from the ballast need to be checked prior to doing it?
 
ptonsparky said:
Remove the ballast from the circuit. Make sure your Lamp is suitable for the voltage applied.
I don't know if it's common to use the reducer, but I know of no restriction. I've used them for different types of lamps.
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Thank you. I was under the impression the ballast stayed operational .
 
nizak said:
Thank you. I was under the impression the ballast stayed operational .
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See lamp instructions. Most you probably need to bypass the ballast but I think there are some designed to be direct replacements for the original lamp.
 
ptonsparky said:
Well, you should have known better!🙂


His question was about the lamp but you have a good point.
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Owner provided LED's, ordered online, not likely FCC tested, much less NRTL.

Electronic noise from Amazon junk probably destroyed my photocells.
 
ramsy said:
Owner provided LED's, ordered online, not likely FCC tested, much less NRTL.

Electronic noise from Amazon junk probably destroyed my photocells.
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Most photocells are nothing more than a small heat element with current through it controlled by the cell and a contact on a bimetal spring actuated by the heater. Can't believe harmonics or other high frequency noise on the supply line would effect this very much.
 
kwired said:
Most photocells are nothing more than a small heat element with current through it controlled by the cell and a contact on a bimetal spring actuated by the heater. Can't believe harmonics or other high frequency noise on the supply line would effect this very much.
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My thoughts were the high initial current of the LEDs were the problem.
 
kwired said:
Most photocells are nothing more than a small heat element with current through it controlled by the cell and a contact on a bimetal spring actuated by the heater. Can't believe harmonics or other high frequency noise on the supply line would effect this very much.
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The ones I'm familiar with have a light-dependent resistor that operates a circuit that triggers a relay or a triac.

I would think that a relay would handle the load. Maybe have your photocell operate a separate contactor.
 
ptonsparky said:
My thoughts were the high initial current of the LEDs were the problem.
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That would be an issue with the switch contacts not being suitable for the application if that is what is happening.

Though we've used these on magnetic ballasts for years and they probably are comparable or even worse when it comes to initial current?
 
kwired said:
Most photocells are nothing more than a small heat element with current through it controlled by the cell and a contact on a bimetal spring actuated by the heater. Can't believe harmonics or other high frequency noise on the supply line would effect this very much.
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For photocell Nameplates that shows "Electronic Ballast" the Amp rating is much less than Tungsten, or Florescent Ballast.
djuly1j3idynn.cloudfront.net/userfiles/images/inriver/original/134402_ek4000%20series%20instructions.pdf
 
kwired said:
Most photocells are nothing more than a small heat element with current through it controlled by the cell and a contact on a bimetal spring actuated by the heater.
Click to expand...
Those must be the slow ones that you wait for with tape over them to test. 😞
 
nizak said:
On many occasions I’ve seen where Edison base corn cob style led lamps are used in HID fixtures.

Is this a common practice to use a Mogul adapter and then use the cob in place of a HPS , Metal Halide, or Mercury vapor lamp?

Would voltage output from the ballast need to be checked prior to doing it?
Click to expand...
They Make corn cob LED lights with mogul bases
 
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