Abstract: An object is to provide a method for easily producing maleimide (MI) in which trace amounts of residual acid components as impurities in a crude MI are efficiently reduced, that is, the acid value is sufficiently reduced. <1> A method for producing purified MI, comprising reducing an acid value of crude MI by 50% or more, by adding carbodiimide (CDI) to a solution comprising the crude MI to react an acid component in the crude MI with the CDI. <2> The method for producing purified MI, comprising adding 0.5% by mass or more and 8% by mass or less of the CDI with respect to a mass of the crude MI for reaction. <3> The method for producing purified MI, wherein the CDI is N,N?-diisopropyl carbodiimide (DIC). <4> The method for producing purified MI, comprising removing a urea derivative of the CDI (CDI-U) by-produced when reacting the acid component in the crude MI with the CDI.

Abstract: A lighting apparatus comprises: an LED module; a heat sink releasing heat generated by the LED module; and a light source supporting body having a locking part locking to the heat sink so as to hold the LED module on the heat sink. This avoids the necessity of screws used for attaching the LED module to the heat sink, and hence reduces the number of components and realizes easy attaching work for the light source. Thus, workability is improved in comparison with the conventional art.

Abstract: A lighting apparatus includes: an LED module; a power supply part supplying electricity to the LED module; a heat sink releasing heat generated by the LED module; a cap containing in the inside at least a part of the power supply part; and an insulating member located between the cap and the heat sink. In the insulating member, one end side has a connection part connected to the inside of the cap. The connection part has an opening part conducting heat from the power supply part to the cap. Since the opening part is provided in the connection part connected to the inside of the cap, a part of the power supply part is arranged in the inside of the cap without being blocked by the insulating member.

Abstract: A lighting apparatus comprises: an LED module; a heat sink releasing heat generated by the LED module; and a light source supporting body having a locking part locking to the heat sink so as to hold the LED module on the heat sink. This avoids the necessity of screws used for attaching the LED module to the heat sink, and hence reduces the number of components and realizes easy attaching work for the light source. Thus, workability is improved in comparison with the conventional art.

Abstract: A lighting apparatus includes: an LED module; a heat sink releasing heat generated by the LED module; a cover covering the LED module; a cap; and an insulating member located between the cap and the heat sink. Further provided is a light source supporting body having a locking part locking into the heat sink so as to hold the LED module on the heat sink. The cover has a protruding part fitting and locking into the light source supporting body or the heat sink. In the insulating member, one end side has an inserted part locking into the heat sink, and the other end side has a connection part screwed into the cap.