I had a similar experience to several reviewers. The first time 2 out of 4 bulbs broke. I sent them back to be replaced with another set which blew up in less than a couple of months. Very disappointed! UPDATE: They sent me a new pack of lightbulbs. Haven't tested them yet but it was very nice of them to send them back in response to a review. Thank you!
OttLite T18330 Replacement Tube Bulb
9 Review
🔆 High-Quality Replacement Light Bulb: CFML27VLX 27 Watt Natural Daylight Spectrum Bulb for Verilux Happy Eyes - 27 Watt 6500K CFL Bulb with GX10Q-4 4 Pin Base in a Square - 1 Pack
3 Review
SleekLighting 23W T2 RED Light Spiral CFL Bulb, 120V, E26 Medium Base - Energy Saver (Pack of 2)
8 Review
💡 Philips LED 417089 Energy Saver Compact Fluorescent T2 Twister (A21 Replacement) Household Light Bulb: 2700K, 18W (75W Eq.), E26 Base, Soft Warm White, Pack of 4
4 Review
💡 Energy-Saving T2 Spiral CFL Bulb, 5000k Daylight, 23W (100W Equivalent), 1520 Lumens, E26 Medium Base, 120V, UL Listed - Pack of 8
7 Review
💡 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
🔆 F10T5-3000K Warm-White 16.5 in. - 10W T5 Fluorescent Tube, Warm White Color
8 Review