Photo Electronics

Go to content

Main menu

INTRODUCTION

Products > Hot Restrike System

Really a wonderful lighting!

...But this happens after even a short mains interruption!

Lighting discharge lamps (Metal-halide and Sodium High-pressure), are considered the best systems available today for their  light emitted/current absorbed high ratio. The efficiency of such lamps, in fact reaches and in some types exceeds 80 lumen/watt, that is 5-6 times more the quartz-jodine lamps efficiency (at  the same current absorption). Despite of the advantages, discharge lamps use on many enviroments has been limited because they can't be turned off and on again like normal incandescent lamps.
It is well known in fact that switching them off, it needs some minutes to let them to be restriked again. This problem is rather irritating in case of short electric power supply interruption or voltage dropped, due to main supply line troubles or momentary high energy absorptions.

Photo Electronics Company has finally solved the problem.
The new INSTART SYSTEMS power units series, let the discharge lamps instant re-start.

The particular circuitry used, offers guaranty of quality and reliability at prices really favourable, comparable with the traditional systems.
The production covers the whole range of power supplies for  Metal-halide and Sodium High pressure double-ended socket lamps .

Metal-Halide and Sodium High Pressure lamps can be immediately re-ignited after a main supply interruption by special devices called Hot Restrike Systems.
On fig.1 is showed the relative voltage that the ignitor must give to relight a metal-halide lamp in relation to the time elapsed from the main supply interruption. The maximum value is necessary after about 3 seconds, then ignition voltage begins to decrease up to reach the typical voltage necessary for the lamp cold start.

Normally H.R. systems are composed by a normal ballast and a special superimposed type ignitor, the device which produces the necessary High Voltage pulses for the lamp hot restrike.
Their value may change in according to the type and power of discharge lamp: 15-25 KV for HPS types, 30-40KV or even more for MH types.


Photo Electronics introduces a new line of H.R. Systems called "Instart Systems", with prices comparable with normal cold start gears, and for this reason they can replace conventional Power Units not only in special application, but also in general lighting applications such as sport playgrounds, industrial and commercial areas, residential houses and buildings.

Back to content | Back to main menu