Brushed Aluminium Up & Down Wall Light

Do these have glass covers on both top and bottom?
Yes this is an outdoor IP54 sealed unit.

Is this suitable for use on buildings near the ocean?
The finish of this product is aluminium so no, it is not recommended for use near the coast. A galvanized or copper finish would be more ideal, look at our coastal section for those which are corrision resistant.

What is the diameter of the cylinder please and how tall is the light? Is this weather resilient for outdoors? And finally does it come with an LED light.
The diameter is 75mm and the eight is 200mm. The fitting is IP54, so it suitable for use outdoors (but can be used inside if you wish!). The fitting takes 2 x GU10 lamps, so you could use our GU10 LED lamp inside this. This lamp can be found on the spare lamps section and will pop up when you add this to your basket.

Can you please tell me if this has a transformer included in the price, if yes are the lights dimmable and how many volts are they?
This fitting uses mains voltage halogen lamps which are dimmable on any dimming systems. You should be more concerned about the wattage rather than volts. This uses two 35w lamps so has a loading of 70w - you should not exceed the total loading of your dimmer unit.