superdoofus-stratodrive:
ok, here’s mr. facts:
> - incandescent [icd]: $0.50/ea., 2000 hr life
> - compact fluorescent [cf]: $3.00/ea., 10,000 hr life
> - LED [led]: $10.00/ea., 100,000 hr life
>
considering a kWh cost of $0.15, 8.0 hours of usage/day, all lumen outputs equivalent to a 45W incandescent:
> - icd (45W) = $19.80/yr
> - cf (9W) = $3.96/yr
> - led (3W) = $1.32/yr
>
considering that an LED will run for 34 years without burning out at the above usage, the following 34-year costs can be determined:
> - icd: $22.50 in bulbs + $673.20 in electricity = $695.70
> - cf: $13.50 ” ” + $134.64 ” ” = $148.14
> - led: $10.00 ” ” + $44.88 ” ” = $54.88
>
now, if one were to borrow against the amount paid for a light fixture’s 34yr lifetime icd bulb requirements, one would net $695.70. now, if one were to invest that $695.70 into even low-ass yield t-bills (one would have to chip in $4.30 though, t-bills are only available in $100 increments), over the course of 35 years (three 10-year t-bills reupped, followed by a 5-year) one would have an ending balance of $2,428.38.
none of the above takes into consideration that nobody would ever use a lowball t-bill to do this, more likely a mutual fund or hell, you could get .75 oz. of gold or 3 shares of apple stock. whatever, just know that however you invest that almost $700.00 it will be more than quadrupled by the time your $10.00 led finally kicks the bucket.
and remember, this is just for ONE lightbulb. you know you can replace at least 5 incandescents currently burning in your house/apt./barn/business/butt.
so yeah, deeeeeewwwwww eeeeeeeeeeeeeettttt.
What are your recommended LED bulbs? I’ve only ever seen very dim, very expensive ones. $10 sounds optimistic compared to the ones I’ve found.
aimers:
Yesterday afternoon when I landed, I didn’t even need my coat. In fact, I took it off because it was a whopping 43˚ above zero—a temperature I haven’t felt since literally late Sept or early Oct.
I can tell you’ve been in Alaska for a while because you specified “above zero”.
benjaminsteinpro:
Lovin’ HTML5. Pretty much everywhere, it’s gonna be hot.
Then I don’t need a jacket!
rentzsch:
I have an Xserve that’s still on 10.4. It runs a web app with a typical MySQL database backend. Both on metal.
This morning the DB got so slow that the app server started returning “timed out” error pages.
Ungood.
So I dumped the database, created a new Debian VMware instance and loaded up the data. I ssh port-forwarded metal’s 3306 to the new VM and restarted the apps.
Yesterday it took around seven seconds to vend a page. Now it’s back under half a second.
I wonder what I’m doing wrong that MySQL on OSX metal is an order of magnitude slower than MySQL on virtualized Linux.*
Could it be the default settings on Mac OS X Server 10.4 are that much worse than the defaults on Debian 5 Lenny?
Mac OS X’s file system is a lot slower than Linux’s, but I don’t think it could explain this much of a difference.
*You may assume I did the obvious things before migrating the DB from metal to VMware: restart the server, dump+reload the DB, etc.
I’ve never looked too far into it, but I can’t get MySQL on OS X to even keep up with slave replication from masters with similar hardware and moderate to low loads.
Something’s not right, but there’s probably too little demand for it to be adequately figured out yet.