F21K 2/00 - Definition 
Definition statement
This subclass covers:
Light sources that emit light by effects other than thermal radiation and that do not use electric power for the generation of light, for example chemoluminescent, triboluminescent or thermoluminescent light sources.
Chemoluminescent light sources activated by an electric field.
Relationship between large subject matter areas
This group covers light sources per se. The application or incorporation of light sources in lighting devices or systems is covered by subclasses for lighting devices or systems. The structural combination of light sources or lighting devices with other articles is covered by the places for those articles or, if no such place exists, in F21V 33/00.
In this group, it is desirable to add the indexing codes of subclasses F21W and F21Y.
References relevant to classification in this subclass
This subclass does not cover:
Using a radioactive source to excite a material into luminescence | G21H 3/02 |
Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation | H01J 65/04 |
Lamps in which a gas filling is excited to luminesce by radioactive material structurally associated with the lamp | H01J 65/06 |
Lamps in which a screen or coating is excited to luminesce by radioactive material located inside the vessel | H01J 65/08 |
Lighting devices or systems thereof, being portable or specially adapted for transportation | F21L |
Non-portable lighting devices or systems thereof | F21S |
Functional features or details of lighting devices or systems thereof; Structural combinations of lighting devices with other articles, not otherwise provided for | F21V |
Informative references
Attention is drawn to the following places, which may be of interest for search:
Luminescent materials | C09K 11/00 |
Light sources using semiconductor devices as light generating elements, e.g. using light emitting diodes [LED] or lasers | F21K 9/00 |
Using photoluminescent materials for modifying spectral characteristics of the light emitted by lighting devices | F21V 1/17, F21V 3/08, F21V 3/12, F21V 5/10, F21V 7/26, F21V 7/30, F21V 9/30, F21V 9/45, F21V 13/08, F21V 13/14 |
Electric discharge tubes or discharge lamps | H01J |
Transforming the wavelength of the light of gas- or vapour-discharge lamps by luminescence | H01J 61/42 |
Semiconductor devices specially adapted for light emission | H01L 33/00 |
Organic semiconductor devices specially adapted for light emission | H01L 51/50 |
Semiconductor lasers | H01S 5/00 |
Electroluminescent light sources | H05B 33/00 |