Do 2 trillions make 1 sextillion?

The way your question is stated ("2 trillions") is not the way your detail text is usually spoken ("trillion trillion") As the first answer kind of blunders through - you have to multiply to make the words work (and the answer is different in UK vs USA) but a trillion trillion light bulbs is a sextillion. (in USA trillion = 1,000,000,000,000 )

The power of the light emitted from the sun is about 3.84x10^26 watts.

A trillion trillion is 10^12 * 10^12 or 10^24.

So their comparison of "4 trillion trillion light bulbs" are to 100W bulbs. Since an incandescent bulb and the sun are both thermal emitters, and both have similar surface temperatures, that's a pretty good comparison.

1 Trillion is 1,000,000,000,000, or a 'one' with 12 zeros after, or in scientific notation, 10^12. Each new '...ilion' is 1,000 times the previous one. After Trillion, you have Quadrillion, then Quintillion, then Sextillion, so you took a Trillion, or 10^12 and multiplied by 1,000, 3 times, which is the same as adding 3 to the exponent 3 times, so you've added 9 to the exponent, making it 10^21...a 1 with 21 zeroes. We don't have names for numbers that large. In fact, everything past a Quadrillion is rarely called by a name, and is written in scientific notation.

The simple answer is; NO, it takes a BILLION Trillion to make 1 Sextillion.

Well above a certian number of zeros, we stop naming new orders of magnitude - so there is no official name for that number. And we only ascribe an new '...illion' to every third order of magnitude.

a trillion is 1,000,000,000,000 or 10^12th power (12 zeros - each zero is an order of manitude representing a 10 fold increase)

So a trillion of those is 1,000,000,000,000,000,000,000,000 (24 zeros) If we followed the pattern it would be septillion or heptillion (it's the 8th group of 3 zeros from the right, but since the first group represents thousands, then the "...illions" begin with the 2nd group of 3 zeros.

1st group of 3 zeros gets us to the thousands

2nd group gets us to the millions (10 thousand, 100 thousand, million)

3rd - billions (10 million, 100 million, billion)

4th - trillions

5th - quadrillions

6th - quintillions or pentillions

7th - sextillions or hextillions

8th - septillions or heptillions

9th - octillions

10th entillions or nontillions

11th decatillion

A trillion trillion is a septillion.

Different light bulbs have different brightnesses.

1,000,000,000,000 * 1,000,000,000,000 = 1,000,000,000,000,000,000,000,000 Whatever that's called. One Octillion I guess.