I asked them soecificalky about this. This was the response:

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Dear Arno, thank you for your email and pointed out the incorrect information on the website.  We will arrange to make the corrections, specifically:

12/24 V DC (not AC)

+/- 20% (not +/- 10%)

Attached is the manual for this series which has the correct voltage information.

Please if you should have any other questions, please let us know.

Sincerely,

Matt

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I have the tricolor with Anchor light to replace the Lopolight. Works excellent and thanks to the Bayonet easy to replace if needed. I did not modify the powersupppy to the light. 

Cheers,

Arno Luijten
Sv Luna,
A54-121