/**
 * Returns the analytical D65 SPD, normalized to 100.0 at 560 nm.
 * Returns 0 outside [300, 830] nm.
 *
 * Note: not true D65, if you need accuracy - use {@link D65_spd_tabulated} instead
 *
 * @param {number} wavelength_nm
 * @returns {number}
 * @see D65_spd_tabulated
 */
export function D65_spd_analytical(wavelength_nm: number): number;
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