If I recall correctly from reading this link when first published, the exposure times are still much longer than with the Phillips 13139. I'm sure there was also a comment to that effect on the FADU forum recently from someone who had tried this solution. I'm still hopeful that a lamp with similar specs to the 13139 will appear. I have a couple in stock anyway, and they do last a long time. Alex
Originally Posted by MartinP
I've tried all the 'solutions' apart from the LED route. The Osram loses about a stop or more because of its wider beam even if you trim off the bit to ensure a good fit. Converting the lamp with a new long life bulb is good but you still lose a bit of light. Exposure around 40 seconds at 5.6. At least that was my experience with the bulb I chose.