Thanks for the report however that's all working correctly:
* Lamps have special power logic and only function when connected to electric networks
* Combinators and speakers have a power buffer of 1 tick, so unless you pause the game (or set the energy each tick) they will consume the power you set before you ever see it in the tooltip. They do work to set the power.
If you want to get ahold of me I'm almost always on Discord.