Answer: Binary Secret #336

The secret message is:

You rock!

Row by row

Row	Bulbs	Add the ‘on’ numbers	Character
1	01011001	64 + 16 + 8 + 1 = 89	Y
2	01101111	64 + 32 + 8 + 4 + 2 + 1 = 111	o
3	01110101	64 + 32 + 16 + 4 + 1 = 117	u
4	00100000	32 = 32	a space
5	01110010	64 + 32 + 16 + 2 = 114	r
6	01101111	64 + 32 + 8 + 4 + 2 + 1 = 111	o
7	01100011	64 + 32 + 2 + 1 = 99	c
8	01101011	64 + 32 + 8 + 2 + 1 = 107	k
9	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 = [
    "01011001",
    "01101111",
    "01110101",
    "00100000",
    "01110010",
    "01101111",
    "01100011",
    "01101011",
    "00100001",
]
message = ""
for code in secret:
    number = int(code, 2)
    message = message + chr(number)
print(message)

When you run it, it prints:

You rock!