Register a node based off a another node with an altered Def

[Extex]

I want to have a function that registers a node with the same properties as the previous one but with the addition of:
paramtype = "light",
light_source = 4,
on_construct = function(pos)
minetest.after(0.1, function()
--change to original node
end)
end,

[ThorfinnS]

If you are saying you want two nodes with different properties, and one replaces the other, check out farming or farming redo or plantlife or moretrees or anything where a seedling or sapling is replaced by a mature or more mature version. To define those nodes, check out any of the crops in farming redo. (I'd stick with farming redo for the whole thing -- not only is everything (except corn?) exactly one node big, it's very easy to follow how you add a new property to the previous node.)

[Extex]

No not like that here I'll give it to you in pseudocode

Make a function with an argument labeled `name`

Get block with the name of `name`
If it's a valid name then

Declare a table with the properties of the node

Add paramtype = "light" and light_source = 4
Register a node with the new Def with an altered name

end function

[duane]

Register a node with the new Def with an altered name

This is what I use. You can see it in use here.