secrets elon’s sandwhich is a secret because what he eats is personal information.

Public Companies are required to disclose almost nothing. Private companies don't have to disclose anything.
This is what Google is required to disclose: https://www.sec.gov/Archives/edgar/data/1652044/000165204423000045/goog-20230331.htm
They don't even have to say how much money they make from Google Play Services. They don't disclose partnerships with manufactures. Nothing. Anything reported is dug up by investigative journalists or if Google thinks they can get positive public reaction from something they will issue a press release. They aren't secrets. They just aren't required to publish the information.

we don’t know that it reduced net carbon emissions.

Wikipedia says it does. I quoted it earlier. If we assume the entire manufacturing cost of a bulb, ignoring profit and research/development creates carbon emissions, you have $1 worth of carbon emissions for the manufacture of a 100 watt bulb. If you run it until it burns out, it uses $16 in energy. When the Phoebus cartel was operating, there was no solar, wind or nuclear. It was all oil, gas and coal.

what about the material waste of increasing the volume

Do you think LED bulbs should be banned? They are far more toxic than tin, paper thin glass and a milligram of tungsten (which is non toxic).