The T12 combo with 2 bulbs is on the bottom level. If you buy ā??Lights of Americaā? brand shop light, you may find that the version that comes with a switch on a pull chain doesnā??t work properly. I took back my third and final one yesterday. It looked like it was working fine, then Iā??d come back 2 hours later and the light would be off. Iā??d pull the chain, the light would come on, and it would happen again, continuously. They have another version of shop light that works perfectly for me. It does not have an on/off switch, and the lettering on the box is red instead of blue. It also has white instead of silver as a reflective surface (better), and is $5 cheaper ($10.95 without bulbs). Cheap bulbs can be as little as $1.50, and good ones are about $7. This ballast can handle both T8 and T12 bulbs, and several different wattages (1st photo below). Color rendering index (3rd photo below) is a scale from 0-100 which measures how accurately the bulb renders colors, with 100 being perfect. I laugh when grow bulb manufacturers boast of something like an index of 94. Who the heck cares? We want blue for veg and red for bud, both of which look nothing like the actual colors of things.

Well that was a bit of uploading so I'm a little buzzed. If you've been following along you know what I'm talking about.

Thank you for your cooperation.