im debating on whether 10w will be enough or 20w will be too many lumens on a 10g.
most of these auctions on ebay show a 3 wire setup and i noticed some are also DC only (likely for car and boat applications).
Was it as simple as wiring up the black/white and red cables from the lamp to a power plug or did you have to use a transformer
The 10w should be enough, but if you can spring for the 20w, you can always raise it, or add floating plants.
I suggest filtering the results to US sellers, and maybe add the term plug to the search terms. The plugged 10W should be around 25 bucks total, and the 20W should be around 35.