Don't. I had to go back to old fashioned lights this year. Every one of the many bulbs had to be renewed at less than the costs of going old fashioned.
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jambo
'Carpe Diem'
Member of the ebay Blue RIB cover club Member of SABS ( Scottish West Division)
I put a set of submersible lamps on mine. 2 years later they still going strong.
Be aware (I found this out when I nearly bought a set of "waterproof" led lamps). Waterproof doesn't necessarily mean submersible.... they should be IPx7 or greater if they are going swimming ....