This little strobe unit from Whelen is even better than I thought for it's size. [:D] The flash is so bright (even in the daytime) you can not look directly at it. [8D] Weighs almost nothing and fits into a 1" dia hole.  Protudes 7/8" below the lower skin, so Mr. Drag slips right over it.  It has 6ft. of lead and you only need to hook up 2 of the 4 wires. +/-. The third wire is used to set your strobe pattern of which there are about 12 ? 4th wire is to sync up other strobes. So once the pattern is selected ( I picked the double flash ), you can just cut and secure those wires (3 & 4) out of the way.  The actual driver is only about 4" long, fits anywhere. 
USA made and has a 5 year warranty. $70.00 + shipping at various sites and comes in other colors.  Whelen VERTEX Hide-A-Way Super LED Strobe...VTX609. Previous post has the PDF with all the tech info on the unit. 
RB   
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