By Robert Emmons, Owner of "SF Mercantile" and "Haight & Ashbury"

Afterglow: The phenomena of atmospheric light after the sun goes down, the serenity state after coming down from a psychedelic experience and metaphorically reflecting on the events and energy of the past while envisioning the creation of a better future.

Afterglow is an illuminated sculpture designed and installed by Joshua Hubert for the Haight Ashbury Merchant Association. Programmable LED fixtures will be strung overhead between the street poles above the sidewalks in a continuous synced display of colored light patterns that flow and pulse along a span of 0.45 mile length on Haight Street between Stanyan and Central.

An Estimated 840 full color RGB LED fixtures will be suspended between street poles along the length of Haight Street. Each fixture is a 120mm (4.75 in) white globe design spaced 6ft apart from each other and suspended 15ft above the sidewalk along steel Aircraft cable. The cable is tensioned with turnbuckles to take up sag and slack.

Each block will require a power outlet supplied from a local merchant that will use a 60w-100w IP68 Waterproof 24v power supply to power the LEDs. Each power supply will have an Astronomic Timer that will adjust automatically to turn on/off with the changing sunset throughout the year. Each of the 16 zones will each get their own LED controller with radio frequency receiver.

A Master LED controller with radio frequency transmitter will be placed in zone 5 in the middle of the installation that will be used to change patterns and sync the controllers in all zones. The controllers, timers, power supplies, and aircraft cables will be tethered to the poles using steel banding. All installation is accessible by ladder and won’t need public sidewalk closure.

In the above map Afterglow is separated into 16 zones with the LED paths highlighted in RED. Zones highlighted in GREEN ( 5, 10 ) are to be completed before or no later than Labor Day 9/5/202 Zones highlighted in PURPLE ( 1, 2, 3, 4, 6 ) are to be completed before or no later than 10/31/2022 Zones highlighted in BLUE ( 7, 8, 9, 11, 12, 13, 14, 15, 16 ) still need power access and are to be completed before or no later than 10/31/2022 or postponed to be completed after power access is provided.