Answer: Binary Secret #357

The secret message is:

Brilliant!

Row by row

Row	Bulbs	Add the ‘on’ numbers	Character
1	01000010	64 + 2 = 66	B
2	01110010	64 + 32 + 16 + 2 = 114	r
3	01101001	64 + 32 + 8 + 1 = 105	i
4	01101100	64 + 32 + 8 + 4 = 108	l
5	01101100	64 + 32 + 8 + 4 = 108	l
6	01101001	64 + 32 + 8 + 1 = 105	i
7	01100001	64 + 32 + 1 = 97	a
8	01101110	64 + 32 + 8 + 4 + 2 = 110	n
9	01110100	64 + 32 + 16 + 4 = 116	t
10	00100001	32 + 1 = 33	!

Crack it with Python

Python can do the adding for you. int(code, 2) reads a string of 1s and 0s as a binary number. Then chr() turns the number into its character.

secret = [
    "01000010",
    "01110010",
    "01101001",
    "01101100",
    "01101100",
    "01101001",
    "01100001",
    "01101110",
    "01110100",
    "00100001",
]
message = ""
for code in secret:
    number = int(code, 2)
    message = message + chr(number)
print(message)

When you run it, it prints:

Brilliant!