Zoo Med Reptile Basking Spot Lamp 150W - 4 Pack Heat Bulbs for Lizards, Turtles & Snakes - Ideal for Terrariums, Vivariums & Reptile Habitats

People write bad reviews after having bad experiences early on in their reptile-keeping with bulbs having a short turn around. This happens to most people, and then after a year or two, they realize they haven't changed a bulb in over 6 months. As you settle down fiddling with the terrarium, as you learn to be extra careful near the light fixtures, as you learn that you do not even try touching or moving or fiddling with the fixture until the bulb has been off for an hour, as the daily routine and temperature fluctuations becomes set in stone your bulbs will last longer.Incandescent bulbs work by pushing too much electricity through too fine a metal wire filament which the metal wire does not like and is thus forced to emit light and heat to keep the energy moving through the circuit, this warms and brightens the enclosure. Most household incandescent bulbs used to be between 10W and 100W; this product is 150W, that's pushing a whole lot more electricity through basically the same filament -- it's an inherently unstable system which is why no one used them for lighting. They are incredibly sensitive to changes in temperature and placement: wiggle it too much and the filament stretches and pulls itself apart, examine the bulb too soon after turning it off and the wire will break off (this happened to me today), accidentally drop a single drop of water onto a lit bulb and it will catastrophically explode (trust me) I do not believe there is any non-anecdotal evidence for one brand's bulbs being more stable or reliable than another's. When you're buying these bulbs you are making a decision based on weighing your faith in a slightly more expensive established brand or a cheap outsider product. ZooMed is reliable in most other products so I trust them with my bulbs.