Does this quality as an energy saving home improvement

Possibly.

You can claim a credit of 10% of the cost of energy efficient doors, windows and skylights, up to a lifetime maximum of $200.  If you have claimed the credit before, your credit now may be limited by that lifetime maximum.  The credit only applies to the cost of the door, window or skylight, and not installation.  To qualify, the doors, windows and skylights must be certified to meet or exceed EnergyStar version 6.0 standards.  You will need to check with the installer or manufacturer if you don't know the certification.  (I suspect single-pane windows do not meet EnergyStar requirements, but that may depend on the region of the country.  Single-pane is certainly not efficient enough in snow country.)

There's no credit for a solar light.

In Turbotax, the first part of the Energy Efficient Improvements interview only talks about solar, wind and geothermal.  Click next to go to the next section which includes doors and windows.