HALO HLBSL slim can less LED downlights are recessed lights designed for use in new construction, remodel and retrofit installation, without the use of a housing or junction box. The ultra-slim design fits where traditional fixtures can't. Choose your color temperature directly on the fixture. With the flick of a switch, you can choose between 5 color temperatures ranging from warm (2700K) to daylight (5000K) for ultimate flexibility.