It's not a red bulb as such it's a red enhancing bulb, specs are as follows:
Name: 8W, 9" Aqua-Glo
K rating: 18,000
Lux: 20
My other lights are:
Name: 24W, 12" Interpet Triplus
Lumen: 1,400
h Rating: 10,000
Name: 24W, 12" Interpet Blue Moon Actinic
h Rating: 10,000
So yuh...