Answer: Binary Secret #387

The secret message is:

Go Pixel!

Row by row

Row	Bulbs	Add the ‘on’ numbers	Character
1	01000111	64 + 4 + 2 + 1 = 71	G
2	01101111	64 + 32 + 8 + 4 + 2 + 1 = 111	o
3	00100000	32 = 32	a space
4	01010000	64 + 16 = 80	P
5	01101001	64 + 32 + 8 + 1 = 105	i
6	01111000	64 + 32 + 16 + 8 = 120	x
7	01100101	64 + 32 + 4 + 1 = 101	e
8	01101100	64 + 32 + 8 + 4 = 108	l
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 = [
    "01000111",
    "01101111",
    "00100000",
    "01010000",
    "01101001",
    "01111000",
    "01100101",
    "01101100",
    "00100001",
]
message = ""
for code in secret:
    number = int(code, 2)
    message = message + chr(number)
print(message)

When you run it, it prints:

Go Pixel!