Smart light bulb 40W C37 E14 927-65 TW Wi-Fi. LED lamps 2700-6500K. LED lamp with a color temperature of a glow from warm to cold. Wide color gamut provides the most suitable lighting for your daily life. Use cool light for concentration and increase productivity, and soft warm white for relaxation and enjoyment. WiZ's built-in Circadian Rhythms feature allows the luminaire to reproduce natural sunlight throughout the day. Use cyclic lighting to recharge your batteries in the morning and relax after a busy day. CRI 90 brings out the real and vibrant colors of cutlery and makes home-cooked dishes tastier and more appetizing. No glare or flickering light thanks to high-quality electronics. Minimize eye strain while reading or relaxing.