Phosphor and light-emitting equipment using phosphor

A light source, comprising:

• a light-emitting source;
• and
• at least one phosphor;
• wherein:
• the phosphor comprises an inorganic compound which is a composition containing at least M Element, A Element, D Element, E Element, and X Element;
• the M Element is one or two or more elements selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm, and Yb;
• the A Element is one or two or more elements selected from the group consisting of divalent metal elements other than M Element;
• the D Element is one or two or more elements selected from the group consisting of tetravalent metal elements;
• the E Element is one or two or more elements selected from the group consisting of trivalent metal elements;
• the X Element is one or two or more elements selected from the group consisting of O, N, and F;
• and
• the inorganic compound is a composition given by:
• MaAbDcEdXe
• where:
• a+b=1;
• 0.00001≤a≤0.1;
• 0.5≤c≤1.8;
• 0.5≤d≤1.8;
• 0.8×(2/3+4/3×c+d)≤e;
• and
• e≤1.2×(2/3+4/3×c+d.