And veering back to light bulbs, the LEDs are now readily available and fairly reasonable. I paid about $7 each for some 40W equivalents and I swear they are much brighter than the 40W incandescent bulbs I used to get. And my new addition has a two light fixture on one wall. I tried putting two of the 40's in that fixture and it was waaaaaaay too bright. So I got two 25W equivalent LEDs (at a princely 3 watts apiece) and they light up the whole room. Nice.
Yeah, I used to play with mercury, too. It was fun stuff!