Colour temperature is expressed in kelvin (K). The higher the colour temperature, the cooler the impression of the light:
2700K: extra warm white 3000K: warm white 3500K: neutral white 4000K: cool white 5000-5500K: daylight 6000K: cool daylight
Extra warm white creates a warm, inviting atmosphere (e.g. hotel, living room, and catering). Warm white can be used for a pleasant atmosphere (e.g. retail and office). Neutral cool white creates a more businesslike atmosphere, this color gives a sterile atmosphere. Low lighting levels are obtained in interior with warm white light. If a very high level of light is needed, neutral or cool white light is a good choice.
Dim to warm is a dimming technique that adjusts colour temperature as the light is dimmed: it shifts from warm white to extra warm white when fully dimmed. This technique has various names, such as Dimtone or Glowdim.
The IP (Ingress Protection) code indicates the degree of protection against ingress of moisture and solid objects. The code consists of two firures. The first figure indicates the protection against objects and dust: IP 0x - not protected IP 1x - protected against objects with a diameter above 50 mm IP 2x - protected from objects with a diameter greater than 12 mm (touch safe) IP 3x - protected from objects with a diameter greater than 2.5 mm IP 4x - protected against objects with a diameter greater than 1 mm IP 5x - protected against dust ( dust ) IP 6x - dustproof
The second figure indicats the protection against water: IP x0 - unprotected (plain) IP x1 - Protected against dripping water (drip) IP x2 - Protected against dripping water when tilted to 15 degrees IP x3 - protected against spraying water (rain tight) IP x4 - protected against splashing water (splash proof) IP x5 - protected against water jets (splashproof) IP x6 - protected from rainstorms IP x7 - protected against accidental immersion (30 minutes to 1 meter deep) (waterproof) IP x8 - protected from stay under water (pressure proof)
