| abstract |
Lighting unit with at least one LED as a light source, wherein the LED emits primary radiation in the range 300 to 485 nm, this radiation is partially or completely converted into longer-wave radiation by phosphors exposed to the primary radiation of the LED, the conversion at least with the aid a phosphor emitting yellow-orange with a peak emission wavelength at 540 to 620 nm and derived from the class of Eu-activated sialons, where the sialon has the formula M p / 2 Si 12-pq Al p + q O q N 16- q : Eu 2+ obeys, with M = Ca singly or in combination with Mg or Sr, with q = 0 to 2.5 and p = 0 to 3. |