The Closeout Guys via eBay offers the refurbished second-generation Philips Hue 40" Lightstrip Extension 2-Pack for $39.99 with free shipping. That's the lowest price we could find for a pair of refurbs by $4. (Meanwhile, new extensions go for around $30 apiece.) These can connect to any existing Philips Hue Lightstrip Plus, sold separately. (Don't own a Hue Lightstrip Plus? Best Buy currently has one for $49.99 shipped.)

A 90-day warranty applies, but it's not clear who backs it.