The placeable spotlight item (the effects item) does not have the same brightness capability nor the range of the actual spotlight item. Yet costs 40 times less than than the spotlight.
I’d propose that the spotlight (and light FX) items are given the same brightness and range as the actual spotlight, or reduce the price of the spotlight down from 10,000 units to 250 units.
For illustration I have included an image of the two lights side-by-side.
On the left is the Placeable Spotlight FX Item, on the right is the Spotlight item. Both are placed at the same height, have the same cone angle, the same radius, and both are set to maximum brightness. As you can see, the left light is way more than half the brightness.
I would really appreciate this to be made more consistent in an upcoming update! 
ok love you byeeeeeeee xoxoxox