Philips Xitanium LED Xtreme SR Design-In Manual page 36

Design-in Guide - Philips Xitanium LED Xtreme driver
Dynadimmer attention points (cont'd)
Temporary mains power-on (maintenance during the day):
If the power-on time is less than four hours then this deviating power-
on time will be ignored and the average power-on time before the
deviation will be used as reference. Hence, it won't affect the dimming
duration of the next night. If the power-on time is more than four
hours and at least one hour less than the average power-on time of the
three preceding nights then this deviating power-on time will be taken
into account to calculate the average on-time of the five preceding
nights. However, it won't affect the dimming duration of the next night.
• Notes:
The Dynadimmer does not compensate step-wise for the 1-hour
shift in time due to daylight savings time changes in fall and spring.
• The Dynadimmer feature does not support 24h applications (e.g.
tunnels, warehouses). A power off/on cycle is required every 24
hours.
•
Dynadimmer operation is not supported when the driver is
operated on a DC grid.
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