Wavelength conversion member

A wavelength conversion member comprising:

• a substrate mainly made of aluminum, and
• a phosphor layer disposed on the substrate and including phosphor particles and a light transmissive inorganic material,
• the phosphor layer having a pencil hardness of 3B or above.

A wavelength conversion member comprising:

• a substrate, and
• a phosphor layer disposed on the substrate and including phosphor particles and a light transmissive inorganic material,
• the inorganic material including a binding material which binds the substrate and the phosphor particles together, the inorganic material including inorganic particles having an average particle size of not less than 10 nm and not more than 60 nm, the inorganic particles representing not less than 2.5 wt % and not more than 17.0 wt % of the inorganic material.