Leviton 6842 dimmer compatible with GE J6 bulb?

Leviton 6161 is shown on Leviton as 500 watt incandescent-only 4-level dimmer that cannot control a fan.
If this is a ceiling fan and light, then search for fan light dimmer, or fan control,

If this is bathroom fan-light installation, you are needing a countdown timer rated for both bulb and fan... which will require Neutral wire...
Different timer choices with manuals appear following link:
http://waterheatertimer.org/Countdown-timer-horsepower-ratings.html#Leviton

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Hi - I have tested Varilight Pro dimmer modules such as Varilight Pro LED Dimmer Switch module which can be used as a trailing edge or leading edge dimmer so will work with most LED bulbs. Just one thing to note is that they work with a minimum load of 10 watts or 1 lamp all the way up to 100 watts or 10 lamps.

Bad dimmer. Probably not using a high enough watt rated switch. Add up the total of all bulbs to be dimmed and get appropriately rated dimmer. 8x60 watt bulbs=480 watts. Make sure dimmer is rated high enough.

6633-pl is single-pole and 3-way dimmer made for max 600 watt incandescent or halogen load. This dimmer does not work for CFL or inductive loads such as motor.

I have no idea what a 'locator light' is?? Do you mean the LED indicator that shows when power is connected?

Troubleshoot section of manual does not show any solution for LED malfunction.
Contact Leviton for email tech support:
http://www.leviton.com/OA_HTML/SectionDisplay.jsp?section=37619&minisite=10251

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

It's not quite that simple..

According to the manual for your switch, it is stated "Use with magnetic low-voltage transformers, incandescent, or 120V halogen fixtures only." Also, there is a minimum load of 40W or 40VA. Your LED lamp load will need to satisfy BOTH of these requirements. Electronic circuits are not to be "dimmed" with this dimmer - but use of either the VZE04-1L (400W max) or VZE06-1L (600W max) is supported.

You will need to provide the manufacturer and model number of the LED lamp(s) to be dimmed by this switch. Or, you can use traditional dimmers (if desired) with LED lamps that are specifically labeled as "dimmable" on their packaging.

Once the lamp model is known it will be possible to learn about their dimability assuming that they are not cheap imports with no real customer support contacts. Name brand lamps will have this support, and you can even call them yourself and inquire directly about the suitability to task for the dimmer. If the lam company doesn't know about the switch, contact Leviton with the lamp info at Customer Service: 1-800-323-8920 • FAX: 1-800-832-9538 Tech Line: 1-800-824-3005

Good luck!

Google-search: florescent slide dimmer
You have 320 Watts, 120 volts, and the circuit uses 2.6 amps.
Volts x Amps = Watts.

1) The florescent slide dimmers seem to cost $100-120

2) If you search for florescent dimmer, the cost is lower than the slide dimmer.
Leviton sells for $50
http://www.google.com/products/catalog

The Leviton 6681 is a push-button rotary-type incandescent dimmer with 600Watt capacity

If you have incandescent bulbs, the dimmer should work.
If the dimmer has different color wires, try reversing the wires.
If the dimmer replaced a 3-way switch, then this is not the right dimmer.
If you have compact florescent bulbs, you need a dimmer that also dims florescent.

http://www.google.com/products/catalog
Link shows the Leviton 6673 incandescent and florescent dimmer

But you also need dimmable compact florescent bulbs.
http://www.amazon.com/DIMMABLE-COMPACT-FLUORESCENT-LIGHT-SPIRAL/dp/B0014B84ZM

You said they are 50 watt GU10's, so I would assume they are 120V halogens, and you must simply have gotten a bad dimmer. But if these GU10's are 50 watt equivalent (LED's or CFL's) then the bulbs will have their own transformers built into them, and would be incompatible with a dimmer switch. It also might be the case that you have low voltage halogens which would use a transformer, shared or individual, and these would also be incompatible with a dimmer. (I don't know offhand if GU10's are available with low voltage halogens.)

If there are 8 in number t8 then there can be 8 wired.

You should be able to use the 25 watt bulb as long as they are compatible with the socket they mount in... Hope that helps...