Hitachi UB 12DL Technical Data And Service Manual page 7

5-2-3. Specification of fluorescent lamp
The Model UB 12DL is equipped with a natural (EX-D), compact fluorescent lamp equivalent to FPL 9W. Use the
fluorescent lamp specifically designed for the Model UB 12DL (code number 323339, model FPL9 EX-D).
5-2-4. Automatic LED switching function
A fluorescent lamp extinguishes suddenly if the battery voltage becomes low. To prevent this, the Model UB 12DL
automatically switches lighting from fluorescent lamp to LED when the battery voltage is decreased to about 8.5 V.
* The LED will be dim if the battery voltage becomes lower. When using a Ni-MH battery, it may adversely
affect the battery such as decrease in the charging capacity and the service life because the Ni-MH
battery may be over-discharged. It is recommended to turn off the switch immediately and charge the
Ni-MH battery.
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