... Warm White:3, 000-4, 000KLighting lumen:4000-6000lmOperation temperature:-30 degrees - +45 degreesLifetime:>50000HoursIllumination:26Lux(4M);12Lux(6M)Effective Illumination Area ... for showrooms, museums, galleries and offices as partial lighting, shopping ,olls, bars as exhibiting light, such as jewellery, gold, silver omament, fashion , etc ...