Will the t8's light bulbs fit the old t12's sockets? No, T8 bulbs do not fit into T12 sockets. T12 bulbs are 12/8 of an inch in diameter, while T8 bulbs are 8/8 of an inch in diameter. Additionally, the pins on T8 bulbs are farther apart than on T12 bulbs.

t8's take the power to the socket while t12's take power to ballast right? if i remember correctly. . . Yes, your statement is correct. In a T12 fluorescent fixture, the power is delivered to the ballast, which then provides power to the bulbs. In a T8 fixture, the power is delivered directly to the sockets, which then power the bulbs.

Which ones you all trust better t8's or t12's? T8 bulbs are generally considered to be more efficient and reliable than T12 bulbs. They also produce less heat, which can reduce cooling costs. However, T12 bulbs are less expensive than T8 bulbs.

The only issue i see here too, is that they have about 4 more fixtures that they work fine and they don't want to upgrade at these moment, so they may confuse when is time to buy bulbs, you know? This is a valid concern. If the customer has four other fixtures that still use T12 bulbs, it may be confusing for them to have to purchase two different types of bulbs. To address this issue, you could offer to replace all of the T12 bulbs with T8 bulbs and rewire the four remaining fixtures at a discounted rate. This would ensure that the customer has a consistent lighting system and eliminates the potential for confusion. Flag for review