The hotfix (v0.23.6.4) contained a fix specifically for this issue.
There were no other reports regarding it.
Could you provide more details, please?
1. Is 20 EE/s consumption displayed in the lamp or it's visible only in the power grid stats?
2. Does toggle of the lamp power mode resolve the issue?
3. In the power grid stats, do you notice only excessive power consumption or there is an excessive number of power consumers as well?
Thanks for reporting.
Regards!