LED Help! What size and intensity?

I am building a model of a house and i want to light it up with some yellow LEDs, but i don't know what intensity i should get!

Answer:
Get as bright as you can and if they're to bright put a resistor on them. I would look at getting the wide angle type so it doesn't just spot the light.
you should ask the guy at the front desk of your local store because i dont know

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