The Light Wedge is an inexpensive way to fix broken niche tab.
Its easy to use and can be installed in less than five minutes!
Made with corrosion resistant polypropylene with a stainless steel screw.   
Install light wedge as shown in Fig. 1 with rounded side of wedge on light.
Wrap cord around light and put light into niche in pool.
Make sure bottom of light is hooked into light niche.
Tighten stainless screw untill light is tight in niche.