After 1/2 year of loathing & denial, a dedicated $25 15V 220W supply arrived.  

https://www.jameco.com/z/LRS-200-15-MEAN-WELL-210W-15V-14A-Single-Output-Switchable-Power-Supply_2219735.html

Not described on the internet was that it had no IEC manes connector, no fan, no soft switch.  It really was just a bare board with screw mounts.

Most of the board was empty, thus giving a very empty space in need of an enclosure.   There was a trimpot for adjusting the voltage.  The range was 13.5-18V. Fortunately, there was a spare manes connector from the dead 250 watter with ancient style screw holes.

After a day of fabricating, it had been enclosed in tupperware.

The screw mount was modified for easier cable routing.  Be sure neutral & GND aren't shorted, live & neutral aren't reversed, the chassis is GND, & your manes are heat shrinked.  Test without a load to adjust the pot.

After 6 months, the LEDs were back.  They couldn't get as bright as before, because experimenting with PWM over drove them.  You can't drive LEDs with PWM & get the same brightness as a DC voltage.

They were nowhere nearly as bright as a pair of 60W fluorescents, but the fluorescents drove PG&E from $100 to $130/month.  Brighter results with LED strips would cost a lot more than edison mounted bulbs of any kind.  The power supply is going to be expensive & maxed out.