Yeah I guess specifics would help. Primarily I'm looking at the 40 and 60 watt equivalent LED Great Value daylight bulbs with the medium socket size. They have a fogged over lens, basically the led replacement for old filament type bulbs.
Mine are mounted via brooder type lights. On one tank the 10" broader and the other has the 8.5" brooder lamp reflector. Though I don't use the clamp they camr with, I installed a shelf into wall above my tanks and I hang the light from that with the cord, ziptie, and eye hook from the shelf. This way I can adjust the height easily.
So far I used the light calculator on barrreport.com set to eco led's and assumed that was the closest option. Thibgs were okay for a while but just recently very minor amounts of hair/thread algae qnd want to decrease light. However for example my 29 gallon started with 2 60w and 1 40w(LED equivalent), then went with 2 40w and 1 60w and now has all three 40w. And still getting the hair algae growth. Though I wonder if I need to do a blackout to kill the algae and then see if it returns after a couple weeks.
Similar scenario on the 55 gallon except I caught it earlier it has 4 60w bulbs currently thinking about switching 2 to 40w.