Don't wait for the bulb to die - it won't do you any good in the last 6 months. I just wish they lasted longer! Now I have a spare bulb just in case. Ultraviolet light is a godsend for aquariums. I threw the instructions for replacing this bulb in my CF-400UV a long time ago. All you have to do is remove the top of the canister filter and find two small screws near the base of the bulb. Take a Phillips screwdriver, unscrew those two screws and the panel should pop open. You can then carefully remove the glass housing, take out the old light bulb and insert the new one. Tighten everything back up and put the top back on. It takes no more than 10 minutes!
Bulbrite A19 Solana WiFi Connected LED Alexa Smart Light Bulb, Single-A19, Tunable 2200K-6500K Color Temperature, Frost Finish
28 Review
Linkind Dimmable A19 LED Light Bulbs, 60W Equivalent, E26 Base, 5000K Daylight, 9.5W 840 Lumens 120V, UL Listed FCC Certified, Pack Of 12
12 Review
Luminescent lamp Camelion 11066 ultraviolet, E27, 26 W
12 Review
20 Pack 5CCT 4FT LED T8 Ballast Bypass Type B Light Tube, UL/FCC Certified - 18W, 2300Lm, 3000K-6500K Selectable
21 Review
π‘ Compact Fluorescent Light Bulb T2 Spiral CFL - 4100K Cool White, 13W (60W Equivalent) - Pack of 2
6 Review
TCP CFL Double Circle Lamp, 200W Equivalent, Bright White (3500K) T6 Circline Bulb
8 Review
π‘ Energy-Saving T2 Spiral CFL Bulb, 5000k Daylight, 23W (100W Equivalent), 1520 Lumens, E26 Medium Base, 120V, UL Listed - Pack of 8
7 Review
π‘ Philips 230425 Energy Saver Compact Fluorescent Non-Integrated 26W PL-C Soft White 4-Pin Base Bulb - Discover Efficient Lighting Solutions
5 Review