Defy DFF 547/647 F740 Side by Side 1N/LIGHT W/D METThe Defy 463 Naturelight Side by Side fridge technology uses three effective colours of light (blue, green and red) that mimic the natural 24 hour sun cycle. The name Naturelight is inspired by nature, and how vegetables react naturally, in a quest to help consumers live healthier lifestyles. The Defy 463 Naturelight helps to eliminate the amount of unused fruits and vegetables and maintain a strong nutritional value by preserving vitamins for longer.