Today only, Groupon offers the refurbished second-generation Philips Hue LightStrip Plus for $54.99. Coupon code "SALE3" drops it to $49.49. With free shipping, that's $6 under our March mention and $40 under the lowest price we could find for a new one. It features six feet of flexible and bendable light which you can dim or create an array of colors via a smartphone or tablet. A Hue Bridge is required for use (sold separately).

Note: It doesn't include the adhesive tape for placement. A 90-day warranty applies, although it's unclear who provides it.