Set units and decimal places for Tempest Luminosity & Battery Voltage

[tempest_user]

Hi, I am running Weewx 5.1 on a raspberry 2B (runs great), using the weatherflowUDP extension for my Tempest Weather Station. I am using the Belchertown skin. I have added luminosity and windBatteryStatus to the station observation area to the right of the temperature (and left of the radar). The luminosity (labelled Luminance) should be in lux and zero decimal places. The windBatteryStatus (labelled Battery) actually returns the voltage and I would like the unit to be volts, to two decimal places. I am struggling to understand the documentation between weewx, the skin, and tempest on how I set the units and decimal places. Can someone point me in the right direction?

Screenshot of Belchertown skin data in question:

Sensor map in weewx.conf:

[[sensor_map]]

outTemp = air_temperature.ST-00169306.obs_st

outHumidity = relative_humidity.ST-00169306.obs_st

pressure = station_pressure.ST-00169306.obs_st

lightning_strikes = lightning_strike_count.ST-00169306.obs_st

avg_distance = lightning_strike_avg_distance.ST-00169306.obs_st

outTempBatteryStatus = battery.ST-00169306.obs_st

windSpeed = wind_speed.ST-00169306.rapid_wind

windDir = wind_direction.ST-00169306.rapid_wind

luminosity = illuminance.ST-00169306.obs_st

UV = uv.ST-00169306.obs_st

rain = rain_accumulated.ST-00169306.obs_st

windBatteryStatus = battery.ST-00169306.obs_st

radiation = solar_radiation.ST-00169306.obs_st

lightningXXX = distance.ST-00169306.evt_strike

lightningYYY = energy.ST-00169306.evt_strike

Under Belchertown skin in weewx.conf:

[[Belchertown]]

skin = Belchertown

HTML_ROOT = /var/www/html/weewx/belchertown

enable = true

[[[Extras]]]

station_observations = "barometer","outHumidity","cloud_cover","UV","luminosity","rainWithRainRate","windBatteryStatus"