Notice:
The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.
Depends how dark it is. At night, probably, in the daytime probably not. To experiment, remove the bulb from another fixture closer to the deck and try.
When buying cordless power tools, I make sure to get the 12V ones. That way, I can gut and modify a worn out power pack by adding a cigarette lighter cord, and have a plug in power tool without shore power. In addition, the 12V power packs are handy as DC power supplies for testing boat and car electrics. I have used one to test mast electrics with the rig on sawhorses, as we're discussing here.
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.