Table 5.

Changes in reported values and uncertainties (3σ) of NIST luminous intensity and flux calibrations

	Change of value	Quoted uncertainties (3σ)
		Luminous intensity		Luminous flux
	$\frac{Q_{\mathrm{v}\text{.NIST}}-Q_{\mathrm{v}.68}}{Q_{\text{v,}68}}$	1968	1990	1968	1990
2000 K	−0.347%
2400	−0.350
2600	−0.352
2856	−0.353	±1.0	±1.0	±1.4	±1.4
3000	−0.354