15W filament image
15W modelling lamp filament image. Click below to see:
Flashtube in housing.
30W modelling lamp filament image.
Flashtube during discharge.
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Photographed at exactly the same scale as the previous picture is the aerial image of the filament of a 15W Philips microscope lamp. The image is clearly too small to serve as a modelling source for a flashtube of 3mm bore.