This circuit also appears elsewhere on this site, obtained from other sources. This is an 80's American schematic book. Instead the lamp can be used white high-brightness LEDs.
Found on Popular Electronics this circuit has variations found throughout this site and section....
National Semiconductor suggests the figure circuit for stabilizing the peak value of an...
January 8, 2020 – Mouser Electronics, Inc. and celebrity engineer Grant Imahara today released the...