Are we able to change technology using a script?
I haven't heard about shadow technology however the LightingService does have a LightingTecnology property. Lighting technology is not scriptable i think this might be what you are looking for:
https://developer.roblox.com/en-us/api-reference/property/Lighting/Technology
if your talking about this then no you cant
Technology Technology [notscriptable]
A (temporary) non-scriptable property used to determine whether the lighting system is legacy or Future-Is-Bright