This is the big day for pyrotechnic displays

Unabashedly, I am a snob when it comes to putting big fireworks together in an aesthetic whole, rather than something that resembles an action movie big car smashup.

A smart design team can use the entire sky as a canvas of evolving colors, combined with the timing of a sharp comedian.

That said, here’s some perspective.

1. A show like Boston’s on the Charles River Esplanade fires off 5,000 pounds of explosives in its half-hour glory. That performance requires a computerized launch system for five barges floating on the water.
2. Macy’s, the nation’s biggest, goes for an average 1,600 shells a minute – more than three times as many as a typical town display uses for the entire night. That show has more than 40,000 shells fired from six barges in the Hudson River.
3. China produces 85 percent of the world’s fireworks.
4. Many of the styles are named for flowers such as peony, chrysanthemum, or dahlia. Others, after trees, as in willow and palm tree.
5. Prices vary wildly, especially when you’re looking for some serious color intensity and blending rather than honky-tonk garish.
6. Shells are sold by tube diameter, commonly six-, eight-, and ten-inches, with each additional inch typically adding another 100 feet of elevation to the shot. Are some of those bursts really a thousand feet overhead?
7. An aerial shell contains six parts. Or more, depending on what bells and whistles are added on.
8. Larger shells cost average around $336 apiece and may require an 840-foot display radius.
9. Even a small-town show will run between $7,500 to $15,000 to produce, just for the fireworks. Add to that set-up and clean-up labor, sanitation, musicians, and public safety expenses. The average municipal show costs $25,000. In contrast, a wedding show is tabbed for $1,500 to $3,000. But don’t hold me to those figures. Other estimates I’ve seen simply soar.
10. Injuries send about 10,000 Americans to the emergency room every year, two-thirds of them males, and many of the injuries are to children. That’s in addition to 7.9 fatalities. As another safety consideration, more fires are reported on July 4 than any other day of the year – some 19,000.