(Theoretically)
If your house is "off-the-grid", then you'll need to generate power somehow before electric lights will work. You can tell if your power is good by clicking on your mailbox and selecting "Show Bills Information". The Power meter on the right has to be greater than 0 before lights will work. You'll want to set both power and water to "Store" and not "Auto-sell". If you have it set to the default of auto sell, your stored power will keep resetting back to 0 whenever you pay your bills... and thus making your lights turn off.
But if your TV is working and lights don't, I'm not sure. Try clicking on any powered light and selecting "Auto Lights" and then clicking on "All Lights".
But just because you may have a solar or wind generators, doesn't mean you're generating power. There's a current bug where those devices will actually DRAIN power. I have a lot where I have NO powered devices at all, with 6 solar panels and a wind turbine, and I always get negative power.
Using Show Bills Information will always show you your current power. If it's 0 or less, then lights won't work.
ThePsycho
____________________________________________________________
*Accept as Solution button - If a post answers your question please let everyone know by hitting this button.
*Me Too button - 'Me Too' helps track how many players are also experiencing that issue. Definitely make use of this button.
*XP button - Say Kudos and help players 'Level Up' by giving them XP for helpful posts.