They lit it up, and people came.

“Float the Waller” by Ten Eyck Landscape Architects

The Waller Creek Conservancy’s “Creek Show” launched last night with five light installations illuminating a three block stretch of the downtown waterway.

It’ll continue every night from 6 to 11 p.m. through Nov. 21. The installations extend up and down the creek from E. Sixth St. to E. Eighth St.

Last year’s “Creek Show” proved so popular, organizers had to quickly extend the event beyond the one night they had planned.

This year a new roster of artists and architects created temporary installations many of which have kinetic elements such as Luke Savisky’s live video “A/Tx” which uses passersby and reflections of the water to cast undulating patterns underneath the Seventh St. overpass.

Last night, the crowd seemed as a gleefully excited at being on the rarely-visited creekside walkways as they were about the lucent displays.

And that more than suggests the possibilities of how a neglected public space like Waller Creek can so easily be transformed and re-enlivened with thoughtful attention — and artistic interventions.