Answer: Binary Secret #311

The secret message is:

HIGH FIVE

Row by row

Row	Bulbs	Add the ‘on’ numbers	Character
1	01001000	64 + 8 = 72	H
2	01001001	64 + 8 + 1 = 73	I
3	01000111	64 + 4 + 2 + 1 = 71	G
4	01001000	64 + 8 = 72	H
5	00100000	32 = 32	a space
6	01000110	64 + 4 + 2 = 70	F
7	01001001	64 + 8 + 1 = 73	I
8	01010110	64 + 16 + 4 + 2 = 86	V
9	01000101	64 + 4 + 1 = 69	E

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 = [
    "01001000",
    "01001001",
    "01000111",
    "01001000",
    "00100000",
    "01000110",
    "01001001",
    "01010110",
    "01000101",
]
message = ""
for code in secret:
    number = int(code, 2)
    message = message + chr(number)
print(message)

When you run it, it prints:

HIGH FIVE