You can enable/disable the LEDs on an individual AP or an entire group from the ZD. However, seeing status lights on an outdoor AP may be difficult unless you do it after dark.
A better way is to use an analyzer or survey program and record the radio macs for each AP. Filter to a single SSID, sort by RSSI, stand near an AP, record the radio mac of the strongest AP, repeat for all others. The controller will show you ethernet macs for the AP which are different but similar to the radio macs. You can then use the radio macs to figure out which AP is where.