These are large filament lamps designed to produce more heat than light they are extensively used in catering.

You must use the HARD GLASS for food related activities it will not crack when spashed.

The ruby reds are ideal for animal husbandry or pet care they provide a gentle warmth without much light to disturb the patient.

The 250 watt is available in bayonet base at the moment as we have them in stock, however the major manufacturers are now stopping making them so they will be very hard to find in the future. We will keep you updated.

The 300watt and 375watt are only in screw base and not with ruby glass.
If you need a shade and a lamp you might find it easier to use the combined option which is the third item down in this section, you can save a couple of quid at the same time!