This is a small edison screw (E14). This is a 300 degree pygmy oven lamp. The shape of this bulb is pygmy. The colouring of this light is clear. This is suitable in ovens up to the temperature of 300 degrees, it will become dangerous at any higher temperatures. This 15W pygmy oven lamp will provide light within the oven at all temperatures up to 300 degrees celsius. This is a replacement bulb for similar bulbs with use in the oven.