This modest but practically forgotten made-for-TV Sci-Fi/horror flick from the early 90s can be categorized under "small-town USA alien invasions", but with a few notable peculiarities! The hostile alien life form arrives on earth via a meteor shower, which is initially seen as a breathtaking spectacle, and grows stronger by feeding itself on electricity! When it's still relatively small and weak, the creature attacks medium-sized animals like pigs and dogs, but when it becomes more developed, the entire population of the sleepy town is in danger. The alien also crash-landed in the right geographical location because the construction of a nuclear power plant is nearly finalized!
"Not of this World" is not highly memorable or particularly special, but entertaining enough while it lasts. The script is full of clichés and follows the typical structure of old-fashioned alien-invasion movies from the 1950s. There was a revival of those during the mid-80s (with "Strange Invaders", "Lifeforce", "Invaders from Mars" ...) and I guess "Not of this World" joined the retro-party a little bit too late. Since it's a television flick, the gore and disturbing images are not too excessive, but there are nevertheless a couple of nicely gruesome moments and a neato monster-design. Most of the lead characters are endurable, except for the whiny kid and his grampa, and perhaps also the stereotypical Asian business executive.
PS - if you confuse this with the similarly titled but much naughtier "Not of this Earth", starring Traci Lords in various states of undress, you risk being sorely disappointed.