There are 2 types of runway edge lights; elevated or inset.
Elevated are as described and consist of a frangible metal support tube that sits in an holder bolted to the pavement on op of which can be an omni directional lamp or a pair of bi directional lamps. The landing class of runway in term of viz will dictate the intensity of the lights.
Inset lights are generally bi-directional and consist of a forged alloy design that includes flush mounted lenses which are bolted onto a 'can' sunk into the pavement. A more expensive solution but clearly less prone to damage.
In Europe, these are more prevalent where CAT ll/lll ops are permitted and have to be associated with a compliant centre line.
Port of NY use Crouze-Hinds lighting equipment. Question is why in this age use last century edge lights?
Sir George Cayley