From DOE EnergyStar specs
7.1.5. Test report(s) shall be available from EPA-recognized laboratory(ies) for the tested representative model and the variant(s) demonstrating that variant performance for the following parameters varies by no more than the percent indicated while meeting this specification’s requirements:
i. Input current and input wattage: ±10%
ii. Power factor: ±5%
iii. Maximum overall length, except as affected only by variations in lamp base or envelope shape: ±5%
iv. Maximum overall diameter: ±5%
Then, they have rounding allowances.