Hi All, i had the same issue last year and went to the local chandlers in Cobb's quay Poole and asked the owner did he know which type off bulb used on Bavaria's. Don't no mate! But 9/10 the yachts use the same type/bulbs/ fittings on the push pit as the mast head, So on his advice i took the push pit one out, and up the mast i went , success! So you only need go up mast once.
Hope this helps.
Ray