Last week, Spend Matters blogmaster Jason Busch recommended strategic sourcing approaches you can use to lower your personal expenses. (This seems to be a favorite topic of Jason’s every time he and his wife, Lisa, decide to renovate their condo.) His recommendations to aggregate your spending, game depreciation and warranty costs, and use competitive, multi-round negotiations may seem rudimentary for supply managers in the workplace, but are sage (and somewhat unique) wisdom for personal shopping.

I thought I’d borrow Jason’s folksy approach to share a simple sustainable supply strategy you can use in your home: switch to compact fluorescent  (CF) lightbulbs. CF bulbs are more energy efficient, last longer, and are more environmentally friendly than traditional light bulbs. The switch could also shave thousands of dollars from your electric bill.

Truth be told, I owe this tip in part to a previous post I penned (or, rather, keyed) on the energy-saving tactics of Adobe Systems and in part to a recent post from permission marketing guru Seth Godin.

Seth points out that “a typical CF bulb saves the user more than $66 [in reduced electricity costs] over its lifetime.” Multiply that by the number of bulbs in your house, and the savings really rack up. Case in point: Adobe reports saving $105,000 annually by making the switch to CF bulbs.

I counted the bulbs in my house. There’s 97 of them! (My wife is big on interior illumination.) Even if you exclude the 14 bulbs in our two rustic “chandeliers” where the unique form factor of CF bulbs might ruin the aesthetic, the switch would slash my electric bill by $5,478.

Okay, I can hear you doubters grumbling, “Yeah, but those CF bulbs are expensive!” And you’re right. Comparison shopping at the two leading national home improvement store chains reveals that a single CF bulb retails $7.99. By comparison, the retail price for a four-pack of standard incandescent bulbs is $2.34.

Upfront cost for me to switch to CF bulbs: $663.17 — nearly a 1,250% premium over standard bulbs. However, as any savvy supply manager knows, price is just one factor for effective sourcing. When you consider the total cost of ownership (TCO), even after paying a hefty premium at the checkout, the switch to CF bulbs will save me $4,863.94.

Now, if you’ll excuse me, I have a lot of bulbs to replace.