CS wrote:
Thanks. I should add that the bulbs are 24v 25w so 1.04A.

That's even better: if you will use your device only for 24V, the diode
needs to dissipate just 0.6W. Find a diode good for at least 3 times
this number and you are on the safe side. Just notice that the heat
(not large but neither totally negligible) will have to be removed and
redirected where it does not make any harm.

Daniel