Verilux CFS26GU24VLX Natural Spectrum Replacement Light Bulb, 26 Watt 26 Watt Natural Spectrum replacement bulb for the following Verilux models: HappyLight Liberty 5K Energy Lamp - VT10WW1 HappyLight 2500 Energy Lamp - VT01WW1, VT01WW1T, VT01JJ1, VT01JJ1T. Brookfield Natural Spectrum Floor Lamp - VF08AB1, VF01BN1, VF08NB1.