Log in

No account? Create an account

Previous Entry | Next Entry

Flat Screen Monitor: Energy Savings?

So I saw a deal for a wide screen LCD monitor online for $150, and I thought to myself, "That's rather affordable. Maybe I should upgrade my home computer to an LCD. How can I justify this?" and my first instinct, of course, was to hide behind a shawl of "Energy savings!" So I thought I'd do the math, just to see what it would take to recoup the $150 cost of a new LCD.

It turns out that it would take me anywhere from 2 to 8 years, based on best- and worst-case scenarios (I included LCD and CRT, low and high utility rate, awake vs, asleep usage, and best vs. worst case energy efficiency of each monitor in each state).

We're talking about, dare I say negligible, savings. Best possible case was $5.13 savings per month. In this case, it would take over 2 years to recoup the cost of the $150 LCD. Worst case was $1.48 savings per month. This would take over 8 years!

I also included a reasonable guess for the variables, based on my usage habits, and the an average of the best and worst wattage out there for these types of monitors, and came up with $2.82 - $3.12 a month in savings. This realistic estimate puts the time to recoup cost at a little over 4 years (+/- 3 months).

There are a few other variables I didn't bother to include (because they're damn-near impossible to predict without thorough experimentation). This includes how much electricity I'm not using in the winter because of the heat generated by the CRT, in addition to how much extra A/C it takes in the summer, etc. These are ridiculous to include and might even cancel each other out.

So, the conclusion I have come to is that I need to come to terms with the fact that purchasing a new monitor would be nothing more than a luxurious expenditure, and stop kidding myself.


( 2 comments — Leave a comment )
Apr. 29th, 2008 06:42 pm (UTC)
Depends on the size of the CRT, doesn't it?

I was running dual 20" CRTs (running 1600x1200 on each) at home and stepped down to a 20" WSXGA+ LCD when I had the chance a few years ago.

Shortly thereafter, I dumped the beige box and went laptop-only for 99% (or more) of my day-to-day computing.

The next month, my grandma was trying to figure out why our electric bill dropped $7.
Apr. 29th, 2008 07:18 pm (UTC)
It does. The "best vs. worst case energy efficiency" variable effectively controlled for that. My worst case represented a large (and/or inefficient) CRT, while my best case represented a small (and/or efficient) CRT.

Edited at 2008-04-29 07:18 pm (UTC)
( 2 comments — Leave a comment )

Latest Month

December 2010


Page Summary

Powered by LiveJournal.com
Designed by Naoto Kishi