Power supply choose

[indoorgarden]

Hello, are a group of students and we are trying to create an Indoor Garden.
We must decide on a power supply, who can accommodate multiple LED lights, fans, and possibly an Arduino board. What we must know so we can determine which is the right power supply for us?

 

[superninja12]

I would get the official psu https://store.arduino.cc/rs-pro-18w-plug-in-power-supply-9v-dc-2a-level-vi-1-output-dc-plug

 

[indoorgarden]

I would get the official psu https://store.arduino.cc/rs-pro-18w-plug-in-power-supply-9v-dc-2a-level-vi-1-output-dc-plug

Thanks !
And how can i know how many components can i add so the power supply wont burn out or shut down?

 

[superninja12]

I would get the official psu https://store.arduino.cc/rs-pro-18w-plug-in-power-supply-9v-dc-2a-level-vi-1-output-dc-plug

Thanks !
And how can i know how many components can i add so the power supply wont burn out or shut down?

probably too much..