According to :
I got a sensor light with a 2 bulb fixture. The light is really
annoying. It claims that if I shut it off and back on in 5 seconds or
less, it will remain on. Well, that dont work. When I am working
outside I want this light to remain on.

I only use one of the 2 bulbs to save energy. I plugged the other one
with a dead bulb. My idea is to remove the wires going to the second
light, where they attach to the sensor, and wire that socket directly
to the power line with a separate switch. In other words, the sensor
will control one bulb, while the other bulb will be connected to a
switch only. That way I can leave the second light turned on as long
as I want.

Is this legal according to the code?

All sensor lights I've seen (not that I've seen that many... ;-)
have separate individual leads to each socket and the control
electronics.

Eg: in a two bulb fixture, each bulb has its own wire pair,
and the control circuit usually has three leads. Plus ground
screw or lead. Total of 7 or 8.

Which means that you could simply run the appropriate cable
(eg: 12/3) to the fixture. The red and black would go to two
switches. At the other end, you connect one hot (black say)
to the control circuit and one of the sockets, and the other hot
direct to the other socket. Connect neutrals to both.

If the were prohibited by code, I'd expect at least _some_ of the
devices I've seen have cable harnesses that prevent you from doing
that except by cutting cable. In other words, the fixture would
simply have one set of hot/neutral/ground leads (total of 2 or 3),
and no way (except by surgery) to connect to the bulbs independently.

While the installation instructions for sensor lights doesn't
explicitly allow/disallow that kind of connection, and hence
_might_ be considered violating the manufacturer's usage instructions,
I highly doubt that you'd ever get dinged for it. After all,
dual flood fixtures without sensor can be wired up this way,
and if it's a more-or-less standard pattern (metal plate, screws
to a J box, etc), they'd be hard pressed to justify it not
being code compliant.
--
Chris Lewis,

Age and Treachery will Triumph over Youth and Skill
It's not just anyone who gets a Starship Cruiser class named after them.