Author Topic: Manually UV enhancing of hot restriking HID lamps by my UV LED flashlight  (Read 2016 times)
dor123
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Manually UV enhancing of hot restriking HID lamps by my UV LED flashlight « on: March 09, 2013, 12:34:00 AM » Author: dor123
Can I be able to assist in ignition and hot restrike of HID lamps with my UV LED flashlight, that will take the rule of the enhancer inside the lamp?
I think that the wavelength of the UV LEDs inside my flashlight is between 390-400nm, because they are very bright visually and their spectra band are visible in the spectrum using my CD-R.
Which wavelength in the UV the enhancer prodcues that assist the ignition of MH lamps, by ionizing the argon gas? Is this works also with phosphor coated MV and SBMV lamps, or only in clear lamps?

Update: I did hot restrike test of my Philips ML 160W (2 cooling down period), which during it, I pointed my UV LED flashlight, and attached it to the lamp. When the auxiliary discharge appeared, I turned off my UV flashlight for 1/2 sec, to see if that discharge is as a result of some UV assisting, but that discharge didn't disappeared. The lamp eventually hot restruck after 1:58 minutes.
« Last Edit: March 09, 2013, 12:40:41 AM by dor123 » Logged

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Re: Manually UV enhancing of hot restriking HID lamps by my UV LED flashlight « Reply #1 on: March 09, 2013, 01:00:25 AM » Author: Medved
I think you would need more energetic (shorter wavelength) light to effectively aid the ignition and that short wavelength at first is not emited by the LED's and as second, the glass won't let it in.

And for the successful restrike just breaking the gas is not enough. You have to build up enough current in the cold electrode discharge mode, so the electrodes could heat up. But when there is high pressure in the lamp, the overall voltage drop in the cold cathode mode (~150..200V cathode fall + 100V anode column + some excess for the ballast to actually build the current) is above the 230V mains. So you would need mainly higher ballast OCV
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