I want to replace the 4 watt bulb with an led. How many can I put on the 88 watt transformer?

Divide 88 by 4, that'll give you the amount of 4w bulbs you can use... easy math. You have 88w to play with. So you can mix up 4w bulbs and 10w bulbs, just do the math. I believe the 4w equiv. led's are actually either .5w or 1w... so again, do the math. Go by the power the LED uses, not the "output equiv." they tell you.

Hello and Thank You for your question. You can put up to 88 watts worth of LED bulbs on the transformer. Simply add up the wattage of the bulbs to equal no more than 88 watts.