Quote:
Originally Posted by mersar
The issue from my understanding is that the form factor of bulb used in some of the "decorative" fixtures isn't available in LED form, or not at the right lumen rating. Plus there may be some other internals to the fixtures that may be needed to be changed (I'm not positive if sodium vapor bulbs require any form of ballast, but I know thats one issue with fluorescent bulbs that makes converting them to LED often more expensive)
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Sodium heads use a magnetic ballast, starter and capacitor. LED heads have a digital ballast.
While replacing just the bulb in current reflector heads is possible, the lighting is very washed out and results too much dazzle effect (similar to bad automotive retrofits). Replacing old heads with new LEDs results in a much more direct and desirable light pattern.
LED replacements by community are determined roughly by the old group bulb replacement program. I'm not sure what pattern major roads are following, but I know these luminaries are in short supply due to high demand worldwide.
Edit: Some decorative luminaries will not be available in LED, but I know post top globes (like on Centre St bridge) and king acorns (like on 17th SW) are.
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