Вот попалась на работе осрамовская люмка L36W/840. C датой выпуска непонятно. Светит хорошо.
Isn't it regular September 2008 (r,8,9,8) coding?
Absolutely precisely - 09.2008.
I don't know. In that case, what means the 3 after r898?
I don't know. But this figure is in many lamps, after the date of marking.
Also on many of my lamps the fourth digit is separated from the code by space symbol, e.g. r148 1