First some different export labels that are found on many, but not on all of these boxes.
"JIS" stands for "Japanese Industrial Standard".
What "J.B.R.C." stands for, relevant to the Japanese label and period, I have not been able to find out.
"?E.L.R.C." on the round stamps.

ER4
Box: 21 x 21cm.
This box I think is fun. It is a set of 24 midget lights, different colors in transparent plastic holders, with a white plastic cord. I think the presentation is very successful.

ER8
Box: 9 x 25 cm.
I think the cover design of this box is a look-a-like of the former ones; text on the box is "X'MAS DECORATION LAMPS", while on the inside flap it reads "TREASURE ISLAND".

It has an 8-socket plastic electric cord with green sockets. There is room for 9 bulbs, so one reserve.

At the side is the red/white label "EXPORT STANDARD" and stamped with a small (diam. approx. 1,3cm - inches 0,51) round, blue inked stamp. I can only decipher 8.11.

ER9
Box: 11 x 38,5 cm.
The cover design of this box is the same as the former one, but text "TREASURE ISLANDS" is on the lid as well as on the inside flap.

It has an 10-socket green fabric covered electric cord with green sockets. There are 11 figural bulbs, all clear glass and marked 15VJAPAN, room for one reserve; I am not sure they belong to the box.

At the side is the red/white label "EXPORT STANDARD" and stamped with a small (diam. approx. 1,3cm - inches 0,51) round, blue inked stamp. I can only decipher "8...24" could mean 1924?

ER10
Box: 21 x 21 cm.

Box with 20 midget lights; green plastic cord and green bakelite plug. No mention of manufacturer or origin. On the base of the box is blue stamped "220V" and "No. 2756"

The following boxes are various makes, sometimes a production firm is mentioned, but very often the boxes are just marked "Christmas Lamps" or some such indication.

There are sometimes a few variations of each in this collection, or just only one.

No mention of manufacturing firm anywhere, only on the base of the box “110/130 V”.

Various14
Box: 18,5 x 9 cm.
Xmas Lite - Decoration Lamps Set.
Green plastic electrical cord with 9 bakelite sockets. No room for reserve bulb.
On one side of the lid a white label with black printing: “C - 6 130 V”.
On the base of the box a different red label with white printed text: “JIS C. 7505 GRADE A”.

Various14B
Box: 18,5 x 15 cm.
Xmas Lite - Decoration Lamps Set.
Of the same series as the previous one, but larger.
Light green plastic electrical cord with 8 green mottled bakelite socket. The inside of the socket is not the usual copper colored, but a dark grey. There is room for 9 bulbs, probably of a candle shape.
On one side of the lid is a white label with black printing “MF-DC 130 V”. On the base of the box a red label with white printing “JISC ? 9503 EXPORT STANDARD”.

Various 28
Box: 390,5 x 21,5 cm.
“WARTBURG=HASAG” “PERMANENT CHRISTBAUM-GARNITUR”
Inside the lid of the box a white and a green label; also a separate light green label and, stuck on the flap covering the storage compartment of the string, another label, all with directions for use and information. On the side of the lid is another white label, marked "Nr. 49 Wartburg-Hasag-Permanent-Christbaum-Garnitur D.R.G.M. 110/120 Volt VDE".
Bulbs marked "8V ʘ 2424".
The string is green, cloth covered with a plug with two removable pins and 16 green bakelite sockets with candle shaped bulbs. Attached to the sockets are green metal removable clips.
Besides a spare candle shaped bulb, marked "8V ʘ 3124", there was also another bulb enclosed. In an ad this was described as "dennenlucht brander" ( pine air burner).

Mazda replacement lights with 10 lamps 5W 14V. “MADE IN FRANCE”. These were together with the box and are the same model.

Various 31b
Snow White and Seven Dwarfs set.
Box 31,5 x 19 cm.
Same text as the above box, but the graphics are slightly different, e.g. Santa is much closer to the cut-out tree, possibly from blowing up for the larger box. The stamp in the panel on the side is very distinct "MF-SW 220V N0. 8.000". It also has the Walt Disney label, but the export label is missing; I presume it fell off.
Green plastic cord with 16 bakelite sockets.
This is now the 4th Snow White box with the "MF-SW" stamp I have seen.
On the inside of the lid is the standard stamped warning text: “Avant d’allumer, visser à fond toutes les lampes. Alvorens aan te steken, alle lampjes tot einde toe aanvijzen” (screw down the bulbs before lighting).

Various 32.1
Box: 28,5 x 21 cm.
The same graphic as the previous one, but a larger box. Text on the lid “X’mas decoration Star lamps Bulbs set  Medium Fancy”, indicating the "fancy" figural bulbs, while on the previous box is indicated “C-6”, indicating the cone shaped bulbs. Part of the text is repeated on the sides.
Green plastic cord with 16 Bakelite sockets, leaving room for two reserve bulbs. The cord and most of the lamps came with the box.
Engraved either 15V or 15VJapan.
On one side of the box is small white label with printed text “No. 6150   220V”; on the base of the box the red/white “Export Standard” label; on the inside of the lid is blue ink stamped “Avant d’allumer, visser à fond toutes les lampes – Alvorens aan te steken, alle lampjes tot einde toe aanvijzen”.

Various 35
Box 29 x 21cm. Lid fixed to the box.
Old box with similar graphics as boxes 25, 26 and 33. Green cloth covered cord with 16 dark green bakelite sockets. The cord and the bulbs with aluminum base are in my opinion original, the ones with copper base I think are replacements. The aluminum bases are marked 15V Japan, while the copper ones are marked 15V. The yellow switch and the dark brown plug came with the box.
No markings or information, besides a red/white export label on one side of the box with the still to be translated "J.B.R.C.":

Various 36
Box 22 x 14,5 cm. Lid separate.
Although with similar graphics as the previous box, I feel it is not as old. Green plastic cord with 10 plastic bell covers. There were a variation of bulbs in the box, i.e. Sigtay, 15V Japan, 15V, Splendor, but we think that there should be clear glass, round bulbs in it, and that the box dates from the 1950s-60s. The storing of the set is a mystery: stored this way, with the cord underneath the insert, the sides of the insert do not touch the bottom of the box and the two flaps do not seem to have any purpose. I have tried storing them with the bells on top, but then with the cord it is a mess and one flap for the plug, but why two?
Besides the export label on the side and the shop’s gold label on the lid, there are no markings.

Various 37
Box 25 x 9cm.
STAR LAMPS
Old box, no similar graphics in this collection. Green plastic cord with 8 green Bakelite sockets. There is room for 9 bulbs, so one reserve.
The bulbs are the small size, each marked 15V JAPAN, and all clear glass. Of course it is not certain they originally came with the box, but some of them do match the design on the lid.
On the side of the box is “Decoration Lamp Set” and on one short side in a white panel stamped in blue ink: “S-F-110 1?360” (small-fancy ?). Inside the lid the standard stamped text “Avant d’allumer, visser….. Alvorens aan te steken, …”.
On the base there is a red/white export label.

Various 38
Box 15,5 x 14,5cm. Lid fixed to the box.
ELECTRICAL DECORATION SET
Old box with unusual, but nice graphics. The Santa has Asian traits, and because of the text “FOREIGN”, it would be Japanese.
The box was empty, and the inside is not complete. But from the one complete row we can deduct that it were indeed cone shaped bulbs, in compliance with the text on the lid “OLIVE CONE SET”, and  not figurals as depicted on the tree.
Besides the text “Electrical Decoration Set” on each side of the lid, no other markings or labels.

Various 39
Box 31,5 x 34cm. Lid separate.
POPE het nieuwe garnituur voor uw Kerstboomverlichting (the new garniture for your Christmas Tree illumination). Green plastic cord with 16 candle shaped light bulbs on a turnable clip. Bulbs marked “PHILIPS 14V3W HOLLAND”.
The light bulb factory Goossens, Pope & Co.  was established in 1889 in Venlo, Netherlands. The driving force behind the company was the English engineer Frederic Pope. In 1920 Philips acquired a majority of the shares of Pope, but still light bulbs continue to be made under that name for a long time.
The above explains why the bulbs in this box are marked “PHILIPS”.

Various 41
Box: 41,5 x 26,5cm.
"AMPOULES POUR ABRE DE NOËL" "CONTACT PERMANENT" "DECORATION".
Normally I think there are 16 cavities for 16 lamps; the present lamps and cloth covered cord with bakelite sockets with metal clips is possibly an addition, although on the side of the box the label says "GIFU LANTERNS 220-240 W." and someone has added "14Volt", while on the front someone has noted "9L 15V". Maybe only replacement bulbs.
On the base of the box an inspection label with oval blue stamp, reading "The Japan Federation of Electric Lamp Mfrs. Ass. *Inspection Bureau*" "PASSED", and a small round blue stamp, without text as far as I can see, in a corner.

Various 42
Box: 26 x 16cm.
Nine figural lights, clear glass, engraved <M> 14VJAPAN, with a green braided cloth covered cord with nine green sockets; I do not know from what material the sockets are made of. The red Bakelite plug is unusual.
There are no labels or other references on the box. Details, such as the eyes of the frog and the fish, the girl's flower and the cat's medal are highlighted in gold or silver.
The M-mark in a diamond:

Various 43
Box: 18 x 7cm.
Nine bulbs, not coming with the box; box is interesting because of the Export Standard label with its clear circular stamp, with the date and the marking, not complete yet "..E.L.R.C..".

Various 44
Box: 31,5 x19cm
"HOLLY" CHRISTMAS LIGHT SET: 18 figural lights, most of them lanterns and came with the box: 14pc marked "PC15VJAPAN"; 2 marked "15VJAPAN"; 1 unmarked; the berry and the snow-capped lantern are original and also marked "PC15VJAPAN". The cord has 16 holders, dark green bakelite.
Inside the lid the text "Avant d'allumer .....Alvorens aan te steken ...".

On the side of the lid a white label with : ; Mark on the bulb:

Various 45
Box: 19,5 x 35,7lcm
“Electrical Decoration Set” is foreseen for sixteen bulbs plus 2 spare, as mentioned on the label on the side of the box. The wire is a replacement, while the metal clips are original. The 10 Japanese bulbs came with the box, models shown on the cover. All have aluminium base and are marked “16V FOREIGN”, but one is clear glass, while the others are milk glass. I have been told that over the years the defective bulbs were replaced by new ones as long as they were available.
The box is marked “FOREIGN”, meaning it was for export to England, and a triangle logo with “DIAMOND” underneath. This logo is repeated on the white label on the side of the box, reading "ASSORTED LANTERN SET 16 LAMPS AND 2 SPARES WITH CLIP PARMANENT CONTACT FOREIGN" (misspelling of "parmanent" is as on the label). Inside the lid is again a while label, "PERMANENT CONTACT SET Should a lamp fail it should be replaced immediately to prevent other lamps becoming overloaded."
On the base is part of a blue stamp, usually having the date, but now disappeared.

Besides the design on the cover, the box is covered with the well know holly design.

This box comes from the Estate of Harold and Beatrice Bird, United Kingdom.

Various CL.STSS 2

Box: 19 x 9 cm.
“Christmas Lamps” and on the side “Decoration Lamp Set”. Of the same series as the former one.
Green plastic electrical cord with 8 green bakelite sockets; there is room for one reserve bulb.
On one side of the lid, in a white reserve is stamped “N° 3370 30V”; could also be “20V”; presumably the “1” is missing; bulbs are 15V.

Box: 19 x 15 cm, dark blue background.
Light green plastic electrical cord with 16 bakelite sockets and room for 2 reserve bulbs. No indications on the side of the lid, but inside the lid the stamp “Avant d’allumer …”. On the base of the box the red/white label “EXPORT STANDARD” with the round stamp.

Box: 25 x 15 cm, very dark blue background, same size as above, but figural lights, and younger.
Light green plastic electric cord with 16 green bakelite sockets. Room for 2 reserve bulbs. Most of the figural bulbs came with the box. They are all engraved “16V JAPAN”.
Indications on the sides of the lid,: “S-F/220V” and the stamp “Avant d’allumer …” on the inside of the lid.

Box: 31,5 x 11 cm, very dark blue background.
Dark green plastic electric cord with 9 green bakelite sockets; figural lights clear glass, all marked 15V JAPAN; I am not sure that lights and cord are contemporary with the box .
Indications in/on the sides of the lid: “Avant d’allumer …Alvorens aan te steken ... ” and a white label on the inside of the lid "1102 - 110V."
On the base of the box the export standard label with round blue stamp of which some are "..E.L.R.O..." .