Hi, the Philips Hue does not work over wifi. Therefore, it doesn't matter if you have wifi reception on the balcony. The lamp communicates with the bridge via Zigbee. If the connection is not sufficient, the lamp will not turn on. Place the bridge a little closer to your balcony to test whether it works that way. Otherwise you can place another Hue lamp between the router and the balcony. This will then forward the signal to the balcony.
According to the specification, a maximum of 50 lamps and 10 accessories are recommended. Unofficially, up to 63 lamps are supported. So 10 are no problem. --> http://www2.meethue.com/en-us/p/hue-bridge/046677458478/specifications
As far as I know, this works, but you have to press the light switch twice (1st time power off, 2nd time power on again).
As far as I know, the lamps then return to their original white colour and you have to change the colour again if you have set it differently.
The power of 10W LED is somewhat equivalent to a conventional 60W light bulb. Whereby the beam angle is smaller than that of an incandescent bulb (primarily towards the front).
This is the starter pack with the old revision of the Hue Bridge, if you look at the specifications it also looks like the LED lights are in a slightly older version too. The actual differences should be relatively small.
The biggest change in the Hue Bridge 2.0 is the support of Apple's HomeKit for home automation.
You can most easily tell the difference by looking at the shape: Hue Bridge version 1.0 is round Hue Bridge version 2.0 is square.