I hear you there.
I usually break my prototypes on purpose to see how strong they are. Wood glue is pretty strong in the end, but those nuts are probably going to end up being stronger.
If I had to evaluate your design for any potential weaknesses, it might initially be the lack of a crossbrace. but on closer inspection I think your wire guide bit might give it the support you need against lateral shear forces.
On the other hand, if you’re experiencing shear forces on the lamp, something’s gone pretty wrong 
Previously, in glue joint strength testing: