Can we control the tube lights in our house using bolt?

I guess we can do that for a single light with the bolt module and am not sure about controlling all the lights.

We can control upto 5 as we have 5 GPIOs on bolt module.

Not just by using Bolt module alone.
We can control our tube lights with the help of adding some other hardware with bolt module such as a 5v relay, Arduino.

Just have a look at this Home automation for controlling a single home appliance.

Hope this helps!

yes we can control upto five lights with those 5 GPIO pins and 5 RELAYS or 5 relay module avaliable in market you can learn much about relay in internet you can switch 230v supply by just 5v there the majic of relay exist.