Push fit connection will have small ceramic ends
The wire connection has two thin wires at each end
The metal strip connection has (strangely!) two thin metal strips or tabs on either end.

A jacketed lamp will have a small, thin glass tube surrounded with a larger glass tube.

If the lamp you have is thicker than a pencil but is ruby so you cant see inside then it is a jacketed lamp as the actual bit that lights up is about the thickness of a pencil. Jacketed lamps also tend to have quite large ceramic ends on them.

You can see if a lamp has a reflector or not as it is a different colour to the rest of the lamp and only on one side - obviously the reflector side must be placed at the back of the lamp so the light can shine out forwards!

You should be very careful about changing wattages as most fittings are designed to take a specific wattage so putting a higher wattage lamp in a fitting can be a fire risk.

We recommend to only replace a lamp with another of the same wattage.
chip dump lamps