I can see this is confusing for many, so try this one then and you might understand.
With the extremely short lamp visibility range of release build, you never encountered scaling problems as these since lamps disappeared.
There’s no part of the sim I’ve tested since december last year, as night lighting (it’s where I have the most knowhow), so I can guarantee you the actual size of bulbs have remain unchanged since release. But the extended range after update 5 will fool many into thinking they actually got bigger.
But it’s the range where the light starts shrinking/becoming weaker that has extended by quite a lot, due to more realistic visibility range.
Also release build, early september:
A lamp sized 6x6 pixels neither should nor would grow to 12x12 pixels when zooming in x2 except when very close.