Ain’t no sunshine when she’s gone…

Not me.

I swapped out my first batch of LEDs for Candulescent bulbs. Notcing massive improvement on my eyes. Cheers Rusty.

1 incandescent bulb at a time. The world will heal.

@rusty as quartz allows UV through have you used your spectrometer to see the difference between natural quartz and fused quartz and typical window glass and borosilicate glass as I have read the latter can allow UVA and UVB through it.