How can I utilize late evening for night photography (Paris) ?

The floodlights on buildings and bridges are turned off around midnight , so you should have plenty of time. Not sure how late the Eiffel Tower is on. You can walk from Pont Alexander along the Seine past the Place de la Concorde to the Pyramid and then continue to Notre Dame. Or hop a bus or taxi from the Pyramid to Notre Dame. From there take the metro to Charles de Gaulle-Etoile for the Arc de Triomphe - not much else to photograph there, then back on the metro to Trocadero. Be very watchful of expensive equipment around Trocadero.

Thanks Chani, I think, I was not able to get it correctly. Please help me and let me know, if I am missing on this route.

I will reach Gare Du Nord at 19:37 and take taxi till Hotel (Hotel Paris Louis Blanc). Throw my luggage in hotel and take Metro from Louis Blanc - Opera - Invalides and walk to Pont Alexandre III. Walk to Place de la Concorde (650 m). Place de la Concorde to Notre Dame via taxi or bus or boat. Spend some time then take metro from Notre Dame to Charles de Gaulle-Etoile and walk down to Arc de Triomphe. Spend some time then take metro to Trocadero. Take pictures of Eiffel Tower. Take metro from Trocadero to Louis Blanc and back to hotel.

Am I following your suggestion correctly or I need to add/remove something from it ?

How long do you have in Paris? It would be good to have two nights to do this.
The Eiffel Tower lights remains on until 1 am per the website. The "sparkling" illumination begins at the top of every hour for 5 minutes.
If you arrive at Gare de Lyon from Basel at 19:35 (per schedule), it will probably be 21:00 before you get going on the photo jaunt. Buy a carnet to use the Metro to get around. It is 14.10 euro for a book of 10 tickets.
You might have to prioritize to get what you want.
If it gets late, just take a cab back to your hotel.
Day time, walk over to the Canal St Martin and walk toward Bastille to get some nice shots along the canal.

I will have next full day to spend in Paris, but do not want to roam till late night, because next day morning, I will be taking flight at 10:20 AM. To re-phrase :-

Day-1 : Reach from Basel to Gare De Lyon at 19:37. Drop luggage at hotel and then leave to catch few photographic spots.

Day-2 : Full day in city

Day-3 : Leave hotel at 6:30 AM for Airport.

Would you like to mention, what places should I consider that night ? Accordingly, I will plan first night and later for Day-2.

I'm going to give my usual response. Find a postcard rack and (wait for it), buy professionally taken pictures of all of the above!

You can thank me later.

First lets hope you have good weather, so it is good to have 2 nights. Sunset should be about 19:00 and darkness by 19:30 in mid-October. So you should have several hours on the second night and still get to bed early.

You might start at Notre Dame. Take the Metro from Louis Blanc, across the street from your hotel. It is the No 7 line, direction Villejuif, get off at Pont Marie and walk along the north bank of the Seine a short way and cross the bridge to Ile St Louis. On the point of the island, walk across the pedestrian bridge to Ile de la Cite. Should be some good shots of the back of Notre Dame. Walk around to the left, maybe cross the bridge to the south bank of the Seine and get shots of the south side of Notre Dame and then cross back over the Pont au Double pedestrian bridge to get shots of the front facade.

If you want to take a Seine cruise, the Vedettes du Pont Neuf at the far west point of the island have one hour cruises up to the Eiffel Tower and back. the last one is at 22:00.

Or you could walk along the south bank of the Seine to the Pont des Arts and cross over to the north bank and to the Louvre to get shots of the Pyramid. Continue walking along the Seine to Place de la Concorde and Pont Alexander III. From Invalides take the RER C to Tour Eiffel or walk along the Seine. Walk over the bridge to Trocadero for some shots of the Eiffel Tower. Shots looking up from a little ways away from the tower come out pretty good as well. From Bir Hakeim take the No 6 Metro to Etoile for the Arc de Triomphe.

At some point on this journey, it will pass midnight and it will be time to head back to your hotel. Much after midnight, you will need to get a cab, and pick up the following evening. Remember, the No 7 Metro line will drop you right by your hotel at Louis Blanc if you can make the final trains.

Thanks Sam. It was great help.
I will have second day/evening/night too, but not till midnight as I will be leaving for Airport early morning 3rd day. Depend on time spend/taken by each place, what do you suggest, I should divide places among both days ?

I will reach Gare Du Nord at 19:37 and take taxi till Hotel (Hotel Paris Louis Blanc). Throw my luggage in hotel and take Metro from Louis Blanc - Opera - Invalides and walk to Pont Alexandre III. Walk to Place de la Concorde (650 m). Place de la Concorde to Notre Dame via taxi or bus or boat. Spend some time then take metro from Notre Dame to Charles de Gaulle-Etoile and walk down to Arc de Triomphe. Spend some time then take metro to Trocadero. Take pictures of Eiffel Tower. Take metro from Trocadero to Louis Blanc and back to hotel.

Apologies for not being clearer. You'll have nice views along the Seine from Pont Alexandre pretty much all the way to Notre Dame. From the Place de la Concorde walk either through the Tuileries or along the Seine or on Rue de Rivoli to the Place du Carousel. If you walk through the Tuileries (probably the shortest) you'll approach the Arc de Triomphe du Carousel (not to be confused with the other Arc de Triomphe) from the rear, which begins your photo ops of the Pyramid/Louvre. From there you can keep walking along the right bank Seine, past Pont Neuf and the Conciergerie (more photo ops) then cross the bridge to Notre Dame. Or you can take the No. 1 metro from the Louvre to Hotel de Ville and walk from there to Notre Dame.

Since you have 2 evenings, you could split them up. First evening, around Pont Alexander and Invalides and Trocadero (possibly start at Place de la Concorde). Second evening, take the Vedettes du Pont Neuf boat cruise on the Seine around sunset. Then start your photo walking tour from Pont Neuf and around Notre Dame, then the Louvre/Pyramide.