My first thoughts were that these lights seemed strong and industrial. However, 3 light bulbs have broken in my hand as the glass is very fragile, and 2 where the glue that attaches the glass bulb to the bayonet has come unstuck. You'll find that you also have to lift the copper tabs inside each bayonet so that the bulbs can make contact. Something that is not only fiddly, but leaves me unconfident as to how many times I can do this before they snap off. If you're only ever putting the bulbs in once, and leaving them, this shouldn't be a problem. On the plus side, the bulbs are nice and bright.