Induction Lamp

induction lamps exist for ages allready... don't you use a pole finder?

A couple months ago, I have seen such an application at lamp manufacturer in Belgium.

They modulate the light output (and the power demand) as a function of the presence of people.

On a parking place, at 10 PM, when people leave the factory, the light output is 100 %. Later in the evening, when people are gone home, the light output is decreased.

When occasionally someone arrives, the presence sensor detects this and switches the light back to 100%.

This works only when the lamp doesn't need a (long) warm up time.

I have compeleted several projects wherein induction lighting has been installed.

The applications range from transportation (vehicle & rail) tunnels, work shops, and electrical/machinery service tunnels and all are performing well beyond expectations.

Not only do the lights perform well, the cost is comparable (actually lower than MV, MH, & HID) and their service longevity is exceptional with an average 100,00 hours of service as normal.

With lighting maintenance the labor cost for relamping a fixture is considerably higher than the cost of the lamp/bulb so the longer life should also be high priority when deciding what type of lighting to install.

The only drawback is that low temperature shutoff occurs if the ambient temperature should go below the design rating and the lights will not illuminate. (Refer to manufacturer cutsheet and IOM for ratings and limitations.)

I am from India and we are fortunate to have sunshine almost through out India for most part of the year. Kindly let me know which part of the world have you experienced this light going off (do you mean lamp comes on first and when temperature falls it shuts off automatically?) At what temperature does it happen? When it switches off, if you try to turn on - does it fail to turn on?

Is it possible to specify - up to what minus temperature do you feel it must keep working without shutting off> In our lab - when we tested - the lamp did continue to work even at - 60Deg C !!! I will be interested to know from you.