Amazon has the Philips Hue Play Gradient Large Light Tube (Black 569137 or White 573725) for $220 - 15% off coupon (check "Apply Coupon") = $187 with free shipping. Has adjustable color temperature, dimming/color changing function, and measures 4.72" x 4.72" x 3.93".

Also available in Compact size (White) for $136 after 15% discount.