First I would like to state that only people experienced with electrical wiring and lighting sould attempt this. I won't be held liable for a beginner cutting into a live wire, or crossing something and getting hurt or possibly killed. If you cannot do it, seek professional help. That being said......

This is pretty straightforward. I had a perfecto full hood that is at least 25 years old. The ballast was shot and the switch was busted. I first removed the old internals of the fixture, including the plastic shield for better ventilation. I then went on a mission to find the perfect socket. I didn't accomplish this as well as I wanted to, but in the end the one I went with had the best insulating and a good mounting. It was a regent, twin bulb plastic outdoor reflector. It is mounted on two stalks which the wires are fed through, the angle of the bulb can be changed at the elbow, and a really neat feature is the rubber gaskets around the socket opening to help keep moisture out. Also the fact that it is the plastic version and not metal made the next step easier. The actual trumpet of the socket was trimmed down to accept the spring bulbs large transformer base using a dremel, but only enough for clearance as to leave the moisture seal in tact. I made a hole through each side of the hood to mount the flood stalks which I removed from the wall plate, and secured them with the locking washers in the straight out position. I originally tried to mount them through the back of the hood, but the way the elbow teeth are made, they only mesh at like a 41 or 48 degree angle and wanted to push the bulb into the front or rear of the hood. In a custom built hood, this would not really be an issue. The sockets were connected to a brand new extension cord with the multi-end cut off. The bulbs I used are Lights of America 25 watt/100 watt equivelant bulbs. They were just the right size to fit in the confines of the stock hood housing. If you need more light, I have also found a 30 watt/125 Eq that appears to be the same size as the 25/100. The 42 watt/ 150 Eq has quite a large transformer base but will throw a heck of a lot of light in a custom dimension hood. Oh and if I haven't mentioned it, aside from throwing a lot of light for a low power use, it has a transformer built into the base of the bulb. No additional wiring, other than to a power source... conventional socket wiring. And finally... the pics! I have not worked out a reflector system so what you see is unfocused. I will probably add a sheet of foil inside to increase the light throw.

Here you can see the socket, how it is mounted, and where the wires exit.

And lastly, even though it is an X-high, the fixture has no problem illuminating the lowest areas.