I love the idea of indoor summer days, but my wife thinks it's cozy when it's dim inside (never mind that I think she'd enjoy winter more if she could get more

I love the idea of indoor summer days, but my wife thinks it's cozy when it's dim inside (never mind that I think she'd enjoy winter more if she could get more daylight than what's available far north where we live). The dimmable strips sound like an amazing compromise. Are those available at sufficient wattage?