Several flourescents in the shop have been balky about starting of late, so I went down to Home Despot for some replacements.
They have a whole big display of Phillips Alto bulbs. The 40 watt cool white plus that produce 3200 lumens go 10 for 14.95. The "Natural Sunshine" which produce 2200 lumens go for 34.95. The "Natural Sunshine" though have a color rendering index of 92 while the Cool White Plus have 70.
I've been rendering colors just fine for 20 years with cool whites. I might have paid a couple of bucks more for the same brightness and better CRI, but more than twice the price for 2/3 the brightness is totally ludicrous.
I wonder how many people actually buy the things.