Attachments prevent glare by shielding undirected components of the emitted light.
Attachments serve to influence the alignment, dispersion, or direction of the light cone.
Dichroic filters allow only specific portions of the emitted spectrum to pass and exclude others (e.g. IR or UV), thus creating any colored light.
Decorative attachments draw visual attention or create particular mood settings.
Honeycomb screens may also serve as flow collimators in air intakes of LED fixtures.