Steaming mast light install?

i just bought a sailboat that doesnt have a steaming light. From looking online they cost close to $500, and thats not including the install of running it down in the mast, etc. Can someone tell me how much they think it would cost, (like if that 500 is accurate) and also how would you go about running it down in... show more i just bought a sailboat that doesnt have a steaming light. From looking online they cost close to $500, and thats not including the install of running it down in the mast, etc. Can someone tell me how much they think it would cost, (like if that 500 is accurate) and also how would you go about running it down in the mast? Since I'm a new boat owner I'm hesitant to start drilling holes in my mast.
I will mention the electrical panel does have a switch for that light already.
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