I'd select Sun if I could, but for indoor I'd say led, the diode light is more energy-preserving, not making too much temperature. I actually just use a grow purple light stuff I bought for rather not a huge price and it kinda works
Oh believe me - if two politicians have something to fight for and both need somewhat monopoly on being the one who repairs it - the thing is gonna remain fucked up for years untill they find profits out of that