Division Formula 8

Where:

T

Number of measurements performed by the manufacturer for the extrapolation of the $K_{{\mathrm{CO}}_2}$ as defined in paragraph 2.2 of Appendix 2 to Sub-Annex 8 to Annex XXI to Regulation (EU) 2017/1151.

$\stackrel{–}{K_{{\mathrm{CO}}_2}}$

mean of the T values of $K_{{\mathrm{CO}}_{2_t}}$

Where the standard deviation of the power consumption of each efficient exterior LED light ( $s_{\stackrel{–}{P_{{\mathrm{EI}}_i}}}$ ) and the standard deviation of the $k_{{\mathrm{CO}}_2}$ $\left(s_{\stackrel{–}{k_{{\mathrm{CO}}_2}}}\right)$ lead to an error in the CO₂ savings ( $s_{C_{{\mathrm{CO}}_2}}$ ), that error shall be calculated by means of Formula 9.