I got a couple of inexpensive stainless steel LED gooseneck clamp-on lamps at Lowe's. About $17 each, if I remember right. Each lamp had a little plug-in AC power supply with something like 10 VDC output and an inline switch
I replaced the power supply and switch with a 12 V plug and modified the clamp with a center-off toggle switch and a couple of voltage regulators (8 & 9 V). The result is a clamp-on 12 V lamp with 2 brightness levels. On the low setting, it draws less than 0.03 A.
We clamp them on the lift panel above the bed or on the edge of the pull-out bed above the dinette table. We can turn them off while reading our Kindles in bed because they are backlit.
It was a fun and worthwhile project.
- Bernard