The poem was hurriedly written and posted then left and forgotten. I agree with your observation and will try and rework this very soon. I should really have done that before displaying here but it came up in conversation, so I posted to show what I had been talking about. For the moment I favour roaring, to keep the alliteration.

Love your incisive input always.

Waves wiill come, to crash and clash ;
water’s run, they roar and splash
against the lighthouse rock then dash,
as undulations break and smash
on the shore.

While the autumn sun descends,
colours, tints and hues all blend,
to tall lighthouse now is lent
defiant spirit, strong unbent
at its core.

Let her light still show it's beam,
steadfast ‘gainst the ocean’s scheme;
great ships yet steam in streams,
passengers in carefree dreams
pass the door.

By the brightest sign it waves,
darkest sky it now engraves;
souls of floating masses saved
whom the elements have braved,
ever more

Well, I wrote the alternative version bowing to pressure and of course because it was easy to do so. It is a bit rough yet so if I decide to go with it there are a few points to tidy up. At the moment though, I'm still leaning towards the original (with of course that roaring change). I still feel it has an immediacy and insistence that the more conventional version lacks by comparison.

the alternative version. Still not sure though.

for reading and taking the time to make helpful suggestions.

clichéd and dull it may be.but the rhyme and rhythm are meant to be obvious.

is that it is quickly recognised and absorbed by by the lay reader, even if it sometimes sets the more seasoned poets hackles on end. Remember, even the most obvious cliche was fresh one day.

You know Jerry, you are the only commenter to ever put your finger upon the fact this was written as an experiment. It came out of a discussion where all other parties insisted it was an inflexible rule that you must never use a word ending -ing in a poem. I never like being told what I cannot do.

someone suggested removing most of the descriptors from a poem leaving it far less of a work sharing beauty and the minimalist style would have left it no longer a sonnet.