Halogen Flood Installation Question

[Oubadah]

I have a 500w halogen floodlight which I'm about to install. It's supposed to be a wall unit mounted like this:



Is there any reason why I can't install it under the eaves like this:



The manufacturer website, brochure, install instructions etc. specify "wall mount", but there is no warning against soffit mounting either.

Opinions on the internet are vague. I see instructions like "don't mount floodlights sideways", but no explanation.

What do you think?

[FRITZHID]

should be ok, except maybe water entrance points. lamp position is important when horizontal as opposed to end up, which those halogens don't deal well with. the heat causes the contact points and ceramic to degrade.

[Oubadah]

should be ok, except maybe water entrance points.

Well the main reason I wanted mount it on the eaves was to protect it from water. It's an old house with substantial eaves, so it should be fine. My main concern was with heat, but obviously the mount dictates the nearest surface, so it's either close to the wall or close to the eaves. Six of one and half a dozen of the other I suppose.

lamp position is important when horizontal as opposed to end up, which those halogens don't deal well with. the heat causes the contact points and ceramic to degrade.

Ah, that makes sense.