watt per steradian

Name	Symbol	Quantity	Base units
watt per steradian	W/sr	radiant intensity	kg m² s⁻³
The watt per steradian, symbol W/sr, is the SI coherent derived unit of radiant intensity.
Definition			h Δν_Cs²
$1 \mspace{4mu} \text{W} / \text{sr} \mspace{6mu} = \dfrac{1}{(6.626 \mspace{4mu} 070 \mspace{4mu} 15 \times 10^{-34})(9 \mspace{4mu} 192 \mspace{4mu} 631 \mspace{4mu} 770)^2} \mspace{6mu} h \mspace{4mu} {\Delta \nu _{Cs}}^2\\ \\ \\ 1 \mspace{4mu} \text{W} / \text{sr} \mspace{6mu} \approx 1.785 \mspace{4mu} 929 \mspace{4mu} 219 \mspace{4mu} 401 \mspace{4mu} 075 \mspace{4mu} 514 \times10^{13} \mspace{6mu} h \mspace{4mu} {\Delta \nu _{Cs}}^2$