g9 halogen bulb 25w/40w/50w 110v/220v 2700k warm white for wall lamp clear glass each with an inner box

industrial equipment: a magnifying glass, microscope, projectors, optical aperture tester, surface roughness tester etc.; small volume, light, filament through a special processing, not easy to break the wire. this lamp service life of about 1500 hours, 25w for 1500 hours.
the most fine filament 25w minimum, followed by 40w filament is more obvious
than ordinary 25w filament to rough..syi