oh i think i get it...
the bulb is attached to the arm of the lamp itself right? they aren't seperate pieces of geometery
which means, because the whole piece of geometry isn't moving the light isn't moving as well
so yeah, what coldwave suggested and what you thought of should work
but i would think you'd rather parent constaint it rather than parent it.
the only difference really is that you can control a few parameters and also have more freedom on how you organize stuff in your outliner
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Objective C, C#, Java, MEL. Python, C++, XML, JavaScript, XSLT, HTML, SQL, CSS, FXScript, Clips, SOAR, ActionScript, OpenGL, DirectX
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D