Decided to try a led lamp in my enlarger and...

[Rhodes]

When I connected the plug the led bulb began to flash, as a disco light party! With the enlarger time in the on position, the light is continue, in the off/time position, it flashes.
So is the bulb is detecting some current coming from the timer?

Enlarger: meopta opemus III
Timer: jobotronic 4010 auto timer

 

[wiltw]

It is behaving somewhat like a CFL bulb on an auto sensor switch...where an incandescent works fine, the CFL or LED bulb can have fits. If the CFL/LED is one which is designed to permit dimming, I have found that they work fine even on sensor controlled switch circuits or dimmer switches.

 

[Rhodes]

Thanks. And I thought that I dimmable led bulbs would be bad choice for enlargers bulbs.