CP81 300w 230v lamp with GY9,5 lamp base. Suitable for ARRI 300w lamphead. Other brands available.
The lamp is also used in some studio lighting:
Altman:
300L/650L Fresnel.
Arri:
Arrilite, 150/300Fresnel, 650/4, and Arri Junior 300 / 650 Fresnel.
Dedolight:
DLH1X300S and DLH1300SDIM.
Filmgear:
Filmgear 300
Ianiro:
Minispot 1200, Solaris 1630, 1650l, and 1800.
Lowel:
650 Fresnel.
LTM:
Pepper 300
Mole-Richardson:
Betweenie 300 Fresnel and Tweenie II 650 Fresnel