Three things can be considered from your listings:

[*] Starting Line Current / Operating Line Current,

[*] Value without / with Power Factor Correcting Capacitor,

[*] Value for 120 VAC / 240 VAC without Power Factor correcting Capacitor.

Per #1 above, if the Ballast is a simple Linear Reactor type, it very likely would have a near 200% Starting Line Current draw - or 3.2 Amps at 120 VAC, then taper down to a stable Full Operating (Running) Line Current of 1.6 Amps at 120 VAC.

This would be an Operating value with a P.F. correcting Capacitor included with the Ballast's Circuitry.

Per #2 above, the first value of 3.2 Amps at 120 VAC could be the "Non-Power Factor Corrected" value of the Ballast and Lamp assembly, without a Capacitor included in the Circuitry.

This would result in a total Line input Volt-Amp load of 384 VA - falling somewhere around 0.39 P.F. (39% Power Factor)

The second value of 1.6 Amps at 120 VAC could be the "Corrected / High Power Factor" value for the Luminaire's Equipment - and this Circuit would have a capacitor included.

In this "version", the total Line input Volt-Amp load will be 192 VA - falling somewhere around 0.78 P.F. (78% Power factor).

As you can see, the Capacitor drastically improved the Power Factor!

The last "option" (#3 above), might be a Normal Power Factor rating vs input voltage - if the Ballast has the capability of using "Multi-Voltage" inputs (like a "Quadri-Volt" Ballast).

3.2 Amps at 120 VAC / 1.6 Amps at 240 VAC, no Capacitor included (39% P.F.).

These are the options to consider per this particular Luminaire.

Being that it's an "El-Cheap-O" Fixture, and the 150 Watt HPS rating, it's likely that the Ballast will be a simple Linear Reactor (no input Autotransformer section).

Does the Lamp use a Medium Based Screwshell?

If yes, then it's almost 100% sure to be Reactor only, and to make things even cheaper - leave out the optional Capacitor and just let the Customer deal with the Crappy P.F.!

The type of HPS Lamp i described above is a 55 Volt Lamp.

If the Line input Voltage is 120 VAC, there is no need to step up/down the input Voltage via Autotransformer section, and therefore only a Reactor core is needed - reducing the cost of the Ballast Kit.

Let us know what you discover!

Scott35