The National Aquarium in Baltimore, America, is replacing the iconic blue neon wave on the south side of its Pier 3 building and a fixture on the city skyline with LEDs, expected to cut the energy use associated with illuminating the wave by 70 percent.

It's also part of a national trend in which neon lights of all kinds, from Boston's famous Citgo sign to lights in local shopping malls, are giving way to LED systems.

According to the aquarium representatives, the LED system was selected because it looks like neon but uses less energy, and being energy-efficient is part of the aquarium's mission and message these days.

This is the National Aquarium, Baltimore, with its iconoc neon wave on the south side of the building. The neon light will be lit for the last time on Tuesday, and replaced with an energy-efficient LED at some point in the future.