Well that's five preheaters' worth of lamps, so...and knowing you you put vintage fixtures in use with vintage ballasts but modern, nothing-special "just a bulb" lamps.
The 5000K lamps might work really well in the utility and laundry room actually...but cool white works fine for a place like that. From now on though I only plan to buy high-CRI 5000K lamps (Sylvania "Daylight Full Spectrum", GE "Closet&Laundry", and Philips "C50 supreme" though. But I'm already set for life on 52-CRI warm whites...

It's actually seven fixtures if they're two-lampers. I'd probably only use a couple at a time though so i don't eat through my lamps. I'll probably end up getting a couple cases of cool white (whatever type is out by then) lamps when i get my own place to keep my lights going.

I want to keep the lamps that i have in service now in the fixtures so that i only put the hours on those lamps and not my other new lamps. the lamps i have in my fixtures now will probably still work ten years from now at the rate they're used.

Yeah you said you really like cool white...I like these though so I'd buy a case of something like this or whatever the 6500K daylight is at that point to keep my few fixtures going...

I love the 5000K color but not the price! I'd be afraid to use them up at four bucks a lamp! My favorite colors are 5000K and 3500K but cool white are nice to have handy because they're the "universal" color temp that will work in almost any application. I haven't specifically looked for a case of 3500K lamps though so i don't know how the fall price wise with 4100k and 5000K. i'd guess somewhere between the two... Daylight is just too blue for me though in most cases and warm white is rather icky though it's good for indirect lighting. When i get my own house I'll probably use four warm white F20T12 Slyvania GTEs from my case of 30 in my 4X F20T12 trigger start "puff/cloud" fixture. I'll install the fixture somewhere in my house like the kitchen or a hallway or someplace that's finished off and is living space, since i think a fixture like that would look good in the "living space" of my future house.

Interesting, I haven't seen these around here yet. Might grab a pair if I see them since I think some rooms look better in higher colour temps.

Yeah, 4100K and above look weird for rooms with lots of wood...

your right. and warm white looks weird in unfinished rooms. 3500K is alright though IMO. 3500K definetly makes you feel warmer when you're in the basement in your pajamas in the dead of winter...

I feel the opposite , if the room has wood panelling, lower colour temps would look better especially if the wood paneling is dark.

actually you agree with us Joe. warmer color temps look better with wood paneling.

I guess so. Rooms with light coloured wood paneling can look ok with higher colour temps though. I have a room with a lot of blue which looks bad with any light source below 4100K.

Yeah rooms with off-white colored rooms look best when fluorescent lights of the same color are used (baby blue walls --> 5000K or 6500K; red/tan walls --> warm white or 3500K) but with off-white walls 4100K is sort of universal.

Yeah and depending on the climate...in triple-digit temps in CA in the summer I bought my first 5000K CFL (a 13w GE I still have) and it felt much nicer inside on a hot day (The A/C in my late mother's house didn't work).

yeah the cooler temps are nice in the hot weather.

when the weather warms up i change the lamps in my room on my dimmable wrap from F32T8/827 to F32T8/880(skywhite 8000K) makes it a lot cooler

8000K! That's basically blue!

looks like light blue compared to a "Blue" lamp

ahh. i bet 6500K lamps almost appear cool white when mixes with 8000K lamps lol.

I've yet to see a 8000K lamp here before.

Interesting idea for changing the color temperatures based on ambient temperature. I don't do that with fluorescents, but I have a 100w mercury fixture on display that I equip with an HPS retrofit in the coldest part of the winter, a warm-white (Comfort) mercury lamp when the weather is a little warmer, then a /DX mercury as the Spring progresses, and finally an unphosphored 6300K mercury lamp for the hottest months.

Same idea I guess...