newbie - difference between bulbs

[NixH]

Hi everyone i'm a new member to the forum , have had my micra for 2 and a half years now and love it!
I have had my headlight bulb blow on me today though and looking at halfords online i'm abit confused on what bulb it is I need

what is the difference between a dipped beam and full beam bulb , I've read around that they are the same but then when do they sell them under different names?

am i better off getting the full beam one?

thanks for any replies and please don't laugh at me if this seems to be a really obvious answer

this is my first car so i'm yet to work everything i need , i'm kind of just learning as i go along atm :/

 

[NixH]

Thanks for the help ..... I found out what I needed to elsewhere in the end

 

[r-reg-sr]

As long as you swap out the original yellow light ones is a big improvement.55 watt i think Rd legal