Andrew pretty much nailed it.
Top ones are commercial lights. Very similar to the pre universal carrier type but with a different wiring arrangement. These type (but with the correct wiring layout) with the thicker front bezel would be found on pre universal carriers. Bren, Scout, AOP MK1, Cavalry.
The second photos shows the correct style for British made MK1 universal carriers (and some Loyd's), these would be the correct type for your carriers Mark. This style was also found on very early Canadian carriers, this was because Britain sent lights, switches, gauges etc to fulfil the early Canadian contract. Rick has one of these early Canadian carriers.
Hope that helps
Ben