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LED lighting systems have understandably garnered much attention over the past few years. But this does not mean other types of lighting are poor choices.
A case in point is High Intensity Discharge (HID) lighting. Generally, it is a poor choice if you are going with a magnetic ballast version in a lighting refit or new installation. That’s because the magnetic ballasts versions have low efficiency and can’t be electronically controlled. But the same is not true of the electronic ballast versions (eHID).
The power quality problems with the early models have been mitigated through design improvements since eHID first appeared on the market in 1993. For example, most of these have active power correction that corrects for both displacement and true power factor.
Electronic control is an advantage of eHID. Many designs use digital signal processors (DSPs), opening up a wide range of application possibilities because you can make control changes in software.
Obviously, this makes advanced control schemes possible. But for the contractor, there’s an even better advantage. Think about what this means in terms of reconfiguration speed. Instead of climbing up a ladder to change this light one way and then up a ladder to change another light another way, you can sit at a console and change each light almost instantly. That has huge implications for start-up, when the customer is looking at the lighting and isn’t quite satisfied. Presto chango.
Source: Mark Lamendola | Mindconnection